Field Notes8 min read
Field Notes: Abalone Back in the Quadrats
Seven years after seeding began on Tasmania's Lumeriah Coast, juvenile blacklip abalone are turning up in the monitoring quadrats again. Here's why that matters.
Dr. Mara Ellison ·
Journal author
Dr. Mara Ellison
Senior Ocean Ecologist
Mara has spent twenty years diving temperate reefs. At Tidewright she leads ecological monitoring — the surveys that tell us whether a forest is truly coming back.
312 articles by Dr.
Atlas9 min read
The Abrolhos: Where Kelp and Coral Share the Same Reef
The Houtman Abrolhos hosts the Indian Ocean's southernmost coral reefs beside golden kelp beds — the live boundary where warm current meets temperate sea.
Dr. Mara Ellison ·
Science8 min read
Counting Fish With Sound: Acoustic Surveys Explained
How do you count fish you can't see? Acoustic surveys use sonar to turn echoes into biomass estimates. Here's how echosounders work — and their limits.
Dr. Mara Ellison ·
Atlas8 min read
Amsterdam Island: Kelp at the Bottom of the World
Giant kelp at the warm edge of its range, albatrosses that breed nowhere else, and a scientists-only island: a guide to the kelp coast of Amsterdam Island.
Dr. Mara Ellison ·
Atlas9 min read
Anglesey: Kelp, Tides and Bird Islands off North Wales
Tidal races, seabird cliffs and reefs of tangle kelp — a guide to the Anglesey coast, Wales' great island corner of the Irish Sea, underwater and above.
Dr. Mara Ellison ·
Careers9 min read
Aquatic Animal Veterinarian: The Vet Path Most People Never Hear About
How to become an aquatic or fish veterinarian: vet school route, residencies and certifications, aquaculture health work, employers and honest pay.
Dr. Mara Ellison ·
Atlas6 min read
New Zealand's Subantarctic Islands: The Kelp Kingdom Nobody Visits
South of New Zealand lie wind-torn islands wrapped in some of Earth's densest kelp forests. A guide to the Auckland and Campbell islands' wild underwater world.
Dr. Mara Ellison ·
Encyclopedia10 min read
Australian Fur Seal (Arctocephalus pusillus doriferus): Species Profile
A species profile of the Australian fur seal, Bass Strait's biggest pinniped — nearly sealed out of existence, now recovering along the kelp coasts of the south.
Dr. Mara Ellison ·
Encyclopedia9 min read
Ballan Wrasse (Labrus bergylta): The Kelp Forest's Cleaning Foreman
Europe's biggest wrasse rules the kelp rocks: nest-building, sex-changing, shell-crushing — and now conscripted onto salmon farms as a cleanerfish. Full profile.
Dr. Mara Ellison ·
Encyclopedia9 min read
Basket Star (Gorgonocephalus eucnemis): Species Profile
Basket stars unfurl branching arms into cold currents to sieve plankton at night. Meet Gorgonocephalus eucnemis, the kelp coast's living gorgon head.
Dr. Mara Ellison ·
Encyclopedia8 min read
Bat Ray (Myliobatis californica): Species Profile
The bat ray is a winged, shell-crushing ray of Pacific bays and kelp edges. Biology, the famous feeding pits, and why divers mistake it for something grander.
Dr. Mara Ellison ·
Atlas8 min read
The Beagle Channel: Kelp Where Darwin First Saw the Forest
At the foot of South America, one glaciated channel carries giant kelp, sea lions and two centuries of history between two oceans. A Coastal Atlas guide.
Dr. Mara Ellison ·
Science8 min read
Belt Transects and Quadrats: How Ecologists Count a Kelp Forest
Belt transects and quadrats turn a kelp forest into numbers: who lives where, at what density. How these classic survey methods work, and why they endure.
Dr. Mara Ellison ·
Science10 min read
Benthic-Pelagic Coupling: How the Seafloor and the Water Column Talk
Food produced in sunlit surface water rains down to feed the seafloor, and the seafloor recycles nutrients back up. How benthic-pelagic coupling runs a kelp forest.
Dr. Mara Ellison ·
Encyclopedia9 min read
Big Skate (Beringraja binoculata): Species Profile
The big skate is the Pacific's largest skate — a 2.4-metre flatfish-eyed predator of the kelp-edge sands, famous for giant mermaid's-purse egg cases with twins inside.
Dr. Mara Ellison ·
Blue Carbon9 min read
Biodiversity Credit Metrics: How to Measure a 'Unit of Nature'
Biodiversity credits need a unit. Habitat hectares, species richness, condition scores, eDNA indices — the metrics on the table, and what each one misses.
Dr. Mara Ellison ·
Science8 min read
Why Diverse Kelp Forests Bounce Back: Biodiversity, Stability and Insurance
Diverse kelp forests ride out marine heatwaves that wipe out simple ones. Here's the ecology of the biodiversity–stability relationship — and how it guides restoration.
Dr. Mara Ellison ·
Science9 min read
Bioluminescence: Why the Sea Lights Up at Night
Glowing waves, sparkling wakes and milky seas: the chemistry and ecology of bioluminescence, and how to see the ocean light up yourself.
Dr. Mara Ellison ·
Encyclopedia8 min read
Black Croaker (Cheilotrema saturnum): The Night Drummer of the Kelp Bed
The black croaker drums after dark in Southern California's kelp beds. How to identify Cheilotrema saturnum, where to find it, and why it sings.
Dr. Mara Ellison ·
Encyclopedia7 min read
Black Rockfish (Sebastes melanops): The Kelp Edge's Common Schooler
Black rockfish: the dark, schooling Sebastes of northeast Pacific kelp edges — identification vs blue rockfish, life history, fishery and conservation.
Dr. Mara Ellison ·
Encyclopedia7 min read
Black Surfperch: The Kelp Bed's Plodding Picnicker
The black surfperch (Embiotoca jacksoni) is the thick-lipped, slow-browsing seaperch of California kelp beds — live-bearing, territorial and endlessly photogenic.
Dr. Mara Ellison ·
Encyclopedia7 min read
Blackeye Goby: The Drifting Guard Posts of the Kelp Bed
Pale, black-eyed and hovering nose-down over the reef: how to find, identify and read the blackeye goby, one of the kelp forest's most telling fish.
Dr. Mara Ellison ·
Encyclopedia9 min read
Blood Star: The Scarlet Slow-Mover of the Lower Reef
Henricia leviuscula, the scarlet blood star of Pacific reefs — smooth-skinned, patient, and able to catch plankton with its stomach. A complete species profile.
Dr. Mara Ellison ·
Blue Carbon11 min read
Field Sampling for Kelp Carbon: Plot Design, Replicates and Honest Error Bars
Good kelp carbon claims start with good field design. A practical guide to plots, transects, replicates, stratification and the statistics of underwater surveys.
Dr. Mara Ellison ·
Encyclopedia8 min read
Blue-Rayed Limpet (Patella pellucida): The Kelp-Grazer with Neon Lines
The blue-rayed limpet lives its whole life on kelp, its shell shot through with living blue light — a profile of Europe's smallest, most beautiful kelp grazer.
Dr. Mara Ellison ·
Atlas8 min read
Arraial do Cabo: Brazil's Upwelling Kelp Outlier
On a headland east of Rio de Janeiro, wind-driven upwelling chills subtropical water enough for deep kelp beds — Brazil's strangest and most surprising forest.
Dr. Mara Ellison ·
Encyclopedia8 min read
Cabezon (Scorpaenichthys marmoratus): The Grumpy Guardian of the Reef
The cabezon Scorpaenichthys marmoratus is the largest sculpin on the Pacific coast — an egg-guarding ambush predator of kelp reefs with famously toxic roe.
Dr. Mara Ellison ·
Encyclopedia9 min read
California Halibut: The Ambusher in the Sand at the Forest's Edge
California halibut (Paralichthys californicus) is the kelp edge's great ambush flatfish — sharp-toothed, colour-shifting and built to lunge into midwater.
Dr. Mara Ellison ·
Encyclopedia9 min read
California Mussel: The Rocky Shore's Ecosystem Engineer
Mytilus californianus builds wave-swept mussel beds that shelter hundreds of species. Glue chemistry, keystone starfish, zonation and conservation.
Dr. Mara Ellison ·
Encyclopedia9 min read
Canary Rockfish: Comeback Story in Orange and Grey
The canary rockfish went from overfished to rebuilt in fifteen years — one of the US west coast's most instructive fisheries recovery stories.
Dr. Mara Ellison ·
Science9 min read
Holes in the Canopy: How Storm Gaps Reset Kelp Forests
Storms punch holes in kelp canopies, and those holes are where the next forest begins. The science of gap dynamics, light pulses and the patchwork reef.
Dr. Mara Ellison ·
Atlas8 min read
Carmel Bay: Stillwaters, Giant Kelp and Four Decades of Protection
Carmel Bay pairs giant kelp with some of California's oldest marine protection. Explore its reefs, Stillwater Cove and what decades of sanctuary bought.
Dr. Mara Ellison ·
Encyclopedia9 min read
Chain Bladder Kelp: The Canopy With a Rope of Pearls
Cystoseira osmundacea — chain bladder kelp — strings pearl-like floats along California's subtidal rocks. Identification, biology, and why it's no true kelp.
Dr. Mara Ellison ·
Encyclopedia9 min read
Taliepus dentatus: Chile's Kelp Crab and Its Working Fishery
The Chilean kelp crab — jaiba marmola — is a spider-crab grazer of great kelp beds and the centre of a diver-run artisanal fishery. A species and livelihood profile.
Dr. Mara Ellison ·
Encyclopedia8 min read
China Rockfish: The Yellow-Spotted Night Watchman
The China rockfish is a small, blue-black, yellow-speckled reef fish that rarely leaves its crevice. Biology, identification, habits and conservation.
Dr. Mara Ellison ·
Blue Carbon6 min read
Beyond Carbon: Counting the Co-Benefits of Coastal Restoration
A restored kelp forest delivers fish, jobs, cleaner water and coastal protection alongside carbon. Here's how those co-benefits are measured and valued.
Dr. Mara Ellison ·
Careers9 min read
Coastal Engineering Careers: Building With, Not Against, the Sea
Coastal engineers design where land meets water — and the field is pivoting to nature-based solutions. Degree paths, skills, employers and where it's heading.
Dr. Mara Ellison ·
Science9 min read
Feeding the Wrong Forest: How Coastal Eutrophication Crowns Turf Over Kelp
How nutrient pollution from land tips coastal reefs from kelp forest to turf algae, why the shift is so hard to reverse, and what actually brings the canopy back.
Dr. Mara Ellison ·
Science12 min read
Reading Rocky Shores: The Geomorphology Beneath Every Kelp Forest
Shore platforms, reef relief and rock type decide where kelp can grow. How coastal geomorphology shapes forests — and why restoration starts with reading rock.
Dr. Mara Ellison ·
Atlas9 min read
The Commander Islands: Russia's Kelp Outpost of Otters and Fog
Between Kamchatka and the Aleutians, two fog-bound islands hold rich kelp forests, sea otters — and the grave of the ocean's most famous extinction.
Dr. Mara Ellison ·
Encyclopedia10 min read
Common Murre (Uria aalge): The Flying Penguin of Cold Coasts
Meet the common murre, the foot-propelled pursuit diver of kelp-coast upwellings — a flying auk that hunts 100 metres down and raises chicks on bare cliffs.
Dr. Mara Ellison ·
Atlas10 min read
Cook Strait: Kelp in the Middle of New Zealand
Between New Zealand's two islands, ferocious tides mix subtropical and subantarctic water into kelp reefs of rare variety — Wellington to the Marlborough Sounds.
Dr. Mara Ellison ·
Encyclopedia8 min read
Copper Rockfish: The Long-Lived Reef Resident That Needs Kelp to Hide
The copper rockfish (Sebastes caurinus) is a cryptic, long-lived, home-ranged reef fish of Pacific kelp forests. Biology, fishery history and how it recovers.
Dr. Mara Ellison ·
Encyclopedia9 min read
Corkwing Wrasse (Symphodus melops): The Kelp Forest's Nest-Builder
Meet the corkwing wrasse: a small nest-building cleanerfish of Europe's kelp forests, now caught at scale for salmon farms — biology, ID marks, reef role.
Dr. Mara Ellison ·
Encyclopedia10 min read
Crustose Coralline Algae: The Pink Cement That Recruits Kelp Forests
Crustose coralline algae look like pink paint on reef rock, but they are the settlement cue abalone and urchins need. CCA biology and why restoration depends on it.
Dr. Mara Ellison ·
Encyclopedia9 min read
Cystoseira: The Mediterranean's Lost Canopy Forests
Cystoseira and kin built the Mediterranean's underwater forests for millennia. Why these canopy algae are retreating, and what it takes to bring them back.
Dr. Mara Ellison ·
Encyclopedia9 min read
Dall's Porpoise: The Fastest Small Cetacean in the Kelp Latitudes
Dall's porpoise is the slate-and-white speedster of the cold North Pacific, famous for its rooster-tail splash. Biology, range, speed and how to spot one.
Dr. Mara Ellison ·
Encyclopedia9 min read
Decorator Crabs: Walking Gardens of the Kelp Reef
Decorator crabs build living costumes from algae, sponges and anemones using velcro-like hairs. How the disguise works, why it evolved and where to see it.
Dr. Mara Ellison ·
Science9 min read
Diatom Blooms and Iron: The Spring Engine of Cold Seas
Every spring, cold seas ignite with diatom blooms — microscopic algae armoured in glass. The whole event often hinges on one scarce element: iron. Here's how.
Dr. Mara Ellison ·
Science9 min read
The Largest Commute on Earth: Diel Vertical Migration Below the Kelp
Every night, billions of animals rise hundreds of metres to feed, then sink before dawn. How the largest daily migration on Earth threads through kelp food webs.
Dr. Mara Ellison ·
Science8 min read
Drift Kelp and Wrack: The Forest's Gift to the Beach
Kelp forests export a share of everything they grow. Here's how drift kelp feeds open water, beach wrack feeds the shore, and why leaving wrack alone matters.
Dr. Mara Ellison ·
Science11 min read
Mapping Kelp Canopy with Drones: Photogrammetry Methods That Actually Work
How to plan, fly and process a drone survey over kelp canopy — tides, sun glint, polarisers, ground control — for maps you can compare year after year.
Dr. Mara Ellison ·
Atlas11 min read
East Lothian: Bass Rock Gannets over North Sea Kelp
A coastal atlas guide to East Lothian: Bass Rock gannets, Firth of Forth estuary water, wolf-fish reefs, and where the kelp grows clear of the bight.
Dr. Mara Ellison ·
Science9 min read
Ecosystem Engineers: How Species Like Kelp Build Habitats
Ecosystem engineers are species that physically build or remodel habitats — kelp, corals, oysters, beavers. How the concept works and why it guides restoration.
Dr. Mara Ellison ·
Blue Carbon10 min read
Carbon Credits for Eelgrass Restoration: How a Methodology Works
Restored eelgrass can earn verified blue carbon credits. Walk through the real VM0033 methodology and the Virginia case that proved it could be done.
Dr. Mara Ellison ·
Encyclopedia8 min read
Eelgrass: The Kelp Forest's Flowering Neighbour
Eelgrass (Zostera marina) is a true flowering plant whose meadows fringe kelp forests worldwide: biology, wildlife, carbon and how meadows are restored.
Dr. Mara Ellison ·
Atlas8 min read
The Esperance Coast: Remote Kelp of the Recherche Archipelago
Beyond the town and the postcards: a coastal atlas guide to Esperance's remote east — Cape Arid, Israelite Bay, the outer Recherche islands and kelp few people ever see.
Dr. Mara Ellison ·
Field Notes8 min read
Field Notes: Reading the Wrack Line with Volunteers
A Tidewright field note: twice a year, volunteers walk Tasmania's beaches counting cast kelp — because the wrack line tells us what the reef can't.
Dr. Mara Ellison ·
Science11 min read
Fjords Explained: Deep Water Behind a Sill
Fjords are drowned glacial valleys with a rock sill at the door. How that sill shapes circulation, deep-water renewal, anoxia risk — and why fjords shelter rich kelp.
Dr. Mara Ellison ·
Encyclopedia9 min read
Flat Abalone: The Northernmost of California's Abalones
The flat abalone is a deep, flattened grazer of Oregon and northern California reefs — the most northern-centred of California's abalones, never common and rarely seen.
Dr. Mara Ellison ·
Encyclopedia8 min read
Giant Spined Sea Star (Pisaster giganteus): Species Profile
Meet the giant spined sea star, Pisaster giganteus — a blue-gray, knobby-armed giant of kelp-edge sand flats that hunts sand dollars and can span half a metre.
Dr. Mara Ellison ·
Encyclopedia8 min read
Goose Barnacle: Castaways of the Drift Line
Lepas anatifera spends its life attached to flotsam — kelp rafts, driftwood, plastic. Anatomy, the goose myth, tsunami debris and where to find them.
Dr. Mara Ellison ·
Atlas9 min read
Gough Island: Kelp at the Edge of the World Heritage Map
A windswept volcanic island in the sub-Antarctic South Atlantic, ringed by giant kelp and breeding seabirds — and part of one of the most remote marine reserves on Earth.
Dr. Mara Ellison ·
Encyclopedia8 min read
Graceful Kelp Crab (Pugettia gracilis): The Small Twin of the Kelp Crab World
The graceful kelp crab is the smaller, rougher, more widely wandering sibling of the northern kelp crab — as at home in eelgrass as on a kelp frond.
Dr. Mara Ellison ·
Encyclopedia8 min read
Grass Rockfish: The Kelp Bed's Stealth Hunter
Meet the grass rockfish (Sebastes rastrelliger): a shallow-water ambush predator that barely leaves home — and pays for that loyalty when the pressure comes.
Dr. Mara Ellison ·
Encyclopedia9 min read
Gray Whale (Eschrichtius robustus): The Bottom-Feeder That Navigates by Kelp
Gray whales swim some 10,000 km each way between Arctic feeding grounds and Baja lagoons, hugging the kelp line. Feeding, migration, kelping and survival.
Dr. Mara Ellison ·
Encyclopedia9 min read
Gray Whales and Kelp Forests: The Sentinel of the Coastal Migration
Gray whales hug kelp coastlines for 20,000 kilometres a year — feeding, rubbing and hiding calves in the kelp line. The whale–kelp forest connection, explained.
Dr. Mara Ellison ·
Encyclopedia8 min read
Great Sculpin (Myoxocephalus polyacanthocephalus): The Big Head of the Northern Reef
Profile of the great sculpin — one of the largest sculpins of the North Pacific, its spiny head, ambush hunting and role in cold kelp-edge food webs.
Dr. Mara Ellison ·
Encyclopedia8 min read
Green-Lipped Mussel (Perna canaliculus): New Zealand's Famous Shellfish
Endemic to New Zealand, the green-lipped mussel filters big southern water, builds reef — and anchors one of the world's most admired shellfish farms.
Dr. Mara Ellison ·
Encyclopedia9 min read
Green Sea Urchin: The Boreal Grazer That Built the Northern Barrens
The green sea urchin grazes kelp from Norway to Nova Scotia to Alaska. Its biology, the barrens it builds, the roe fishery it feeds, and how reefs recover.
Dr. Mara Ellison ·
Atlas9 min read
Greenland's Kelp Coast: Clear Water, Long Light and a Warming Frontier
Greenland may hold some of the world's largest, least-studied kelp forests — clear water, extreme light, expanding with glacier retreat. A guide to the world's kelp frontier.
Dr. Mara Ellison ·
Encyclopedia7 min read
Grunt Sculpin: The Fish That Walks on Its Fins and Hides in Barnacles
The grunt sculpin is a thumb-sized fish that walks on its fin rays, hides inside empty barnacle shells and, it seems, impersonates the barnacle itself.
Dr. Mara Ellison ·
Atlas8 min read
Gulf of San Matías: Patagonia's Kelp-Fringed Sea Within a Sea
Argentina's Gulf of San Matías is a warmer, tidal sea within the Argentine Sea: giant kelp on volcanic ledges, scallop grounds, octopus divers and sea lion rookeries.
Dr. Mara Ellison ·
Encyclopedia9 min read
Gumboot Chiton: The Armoured Grazer That Shapes Encrusting Algae
Beyond the species profile: how the gumboot chiton's iron-toothed grazing shapes crustose coralline algae, kelp recruitment and the wave-washed reef.
Dr. Mara Ellison ·
Encyclopedia8 min read
Hairy Shore Crab (Hemigrapsus oregonensis): The Quiet Workhorse of Mud and Marsh
The hairy shore crab is the Pacific coast's estuary specialist — bristle-legged, slow-footed and more comfortable in brackish water than its purple cousin.
Dr. Mara Ellison ·
Encyclopedia8 min read
Halfmoon (Medialuna californiensis): The Blue-Silver Kelp Grazer
The halfmoon (Medialuna californiensis) is a blue-grey sea chub that grazes kelp on Southern California and Baja reefs — ID, diet and habitat.
Dr. Mara Ellison ·
Encyclopedia7 min read
Harlequin Duck (Histrionicus histrionicus): The Painted Diver of the Kelp Surf Zone
Meet the harlequin duck: slate-blue plumage, winter life in the surf zone, and summers on wild mountain rivers. Identification, ecology and where to look.
Dr. Mara Ellison ·
Atlas8 min read
Head of Bight: Whales, Cliffs and the Great Australian Kelp Edge
At Head of Bight, the Nullarbor falls into the Southern Ocean and southern right whales nursery beneath the cliffs. A guide to this wild kelp coast.
Dr. Mara Ellison ·
Atlas9 min read
Helgoland: Germany's Only Kelp Island
Helgoland, 46 km off Germany's North Sea coast, holds the country's only kelp forests — and one of the world's longest marine ecological records. A guide.
Dr. Mara Ellison ·
Atlas11 min read
Howe Sound: The Kelp Comeback Fjord at Vancouver's Doorstep
Howe Sound recovered from a century of industrial pollution to glass sponge reefs, returning orcas and thickening bull kelp — an atlas guide to BC's comeback fjord.
Dr. Mara Ellison ·
Encyclopedia8 min read
Humboldt Penguin (Spheniscus humboldti): The Penguin of the Kelp Coast
The Humboldt penguin breeds in guano caves on the desert coast of Chile and Peru, and fishes in one of the richest — and most changeable — seas on Earth.
Dr. Mara Ellison ·
Atlas8 min read
The Inner Hebrides: Sea Lochs, Otters and Kelp
Mull and Skye hide forests of kelp in long, calm sea lochs — otters on the weed ridges, sharks offshore. A visitor's guide to the Inner Hebrides' kelp coast.
Dr. Mara Ellison ·
Atlas13 min read
Ireland's Wild Atlantic Way: Kelp, Storms and Harvest Memory
Kelp forests of Ireland's Atlantic west — the species beneath the cliffs, two centuries of kelp ash money, and a hand-harvest tradition that never died.
Dr. Mara Ellison ·
Atlas8 min read
Kaikōura: Kelp Forests Above a Canyon, Lifted by an Earthquake
Kaikōura packs a submarine canyon, sperm whales and bull kelp into one coastline — and the 2016 earthquake that lifted its reefs rewrote them in a night.
Dr. Mara Ellison ·
Atlas9 min read
Kapiti Island: A Marine Reserve Inside Wellington's Weather
Kapiti Island rises out of Cook Strait's tidal machinery — a predator-free bird sanctuary above water, and protected kelp reefs, seals and blue cod below.
Dr. Mara Ellison ·
Science10 min read
Kelp as Ecosystem Engineer: Building Habitat From Sunlight
Kelp doesn't just grow — it builds. As an ecosystem engineer, kelp reshapes light, flow, chemistry and shelter to create habitat for thousands of species.
Dr. Mara Ellison ·
Science9 min read
The Great Kelp Provinces: How Biogeography Divides the World's Kelp Coasts
Marine biogeography splits kelp coasts into distinct provinces, each with its own species and history. A tour of the regions — and the barriers that made them.
Dr. Mara Ellison ·
Science8 min read
Life Under the Canopy: How Kelp Forests Sculpt Light
A kelp canopy is a living skylight — filtering intensity, colour and flicker for everything beneath it. How that sculpted light builds the understorey.
Dr. Mara Ellison ·
Blue Carbon11 min read
Where Kelp Carbon Goes: The Pathways from Canopy to Deep Sea
Kelp forests don't bury carbon where they grow — they export it. Tracing fragments, dissolved carbon and currents from canopy to the deep sea, and how science tracks them.
Dr. Mara Ellison ·
Science8 min read
After the Blade Falls: The Detritus Pathways of Kelp Forests
Most kelp is never grazed standing. Here's how blades become crumbs, crumbs become food, and how detritus quietly powers reefs, canyons and the carbon ledger.
Dr. Mara Ellison ·
Science7 min read
What a Kelp Forest Provides: Ecosystem Services, Priced Carefully
A full catalogue of kelp forest ecosystem services — fisheries, coastal protection, carbon, water quality, culture — and an honest look at valuation's limits.
Dr. Mara Ellison ·
Farming13 min read
What Does a Big Kelp Farm Do to Its Bay? Shading, Flow and Water Chemistry
The honest science of kelp farm ecosystem effects: shading, current modification, nutrient uptake, benthic change and wildlife — and where scale tips the balance.
Dr. Mara Ellison ·
Science12 min read
Day and Night in the Kelp Forest: How Whole Communities Commute at Dusk
At dusk the kelp forest changes shifts: plankton rises, fish reposition, predators hunt the borders. The daily migrations that run the reef's nightly economy.
Dr. Mara Ellison ·
Science11 min read
How Scientists Measure Kelp Forest Resilience — The Indicators That Predict Recovery
Recruitment, grazer pressure, genetic diversity, canopy continuity: the measurable indicators ecologists use to predict whether a kelp forest will recover.
Dr. Mara Ellison ·
Science9 min read
Listening to a Kelp Forest: What Reef Soundscapes Tell Us About Health
A kelp forest has a 24-hour soundtrack built by shrimp, rasping urchins and singing fish. Learn who the voices are and how scientists read health by ear.
Dr. Mara Ellison ·
Explore8 min read
A Wildlife Calendar for Kelp Forests: What Moves In When
Kelp forests run on seasons: herring spawn on blades in spring, garibaldi garden in summer, storms reseed annual kelps in winter. A diver's phenology, by season.
Dr. Mara Ellison ·
Encyclopedia8 min read
Kelp Greenling (Hexagrammos decagrammus): Species Profile
Kelp greenling are the kelp forest's most colourful small residents — blue-speckled, sex-changing-looking, nest-guarding. Biology, fishery and where to see them.
Dr. Mara Ellison ·
Encyclopedia8 min read
Kelp Lace Bryozoan (Membranipora membranacea): The White Lattice That Stress-Tests Kelp Blades
Membranipora membranacea skins kelp blades in white lattices of tiny zooids — a grazer, a fouler and, in warm years, a real force in kelp forest loss.
Dr. Mara Ellison ·
Science11 min read
How Kelp Travels: Spore Dispersal and the Lottery of Settlement
Kelp forests travel one microscopic spore at a time. How far spores really go, what decides where they settle, and why dispersal shapes every restoration plan.
Dr. Mara Ellison ·
Atlas11 min read
The Kermadec Islands: Where New Zealand's Kelp Meets the Tropics
1,000 km northeast of Auckland, the Kermadec Islands hold kelp at its warm edge — volcanoes, tropical fish and one of New Zealand's great marine reserves.
Dr. Mara Ellison ·
Science10 min read
Drifters and Swimmers: How Marine Life Colonises New Reefs
Almost every reef animal and alga spreads as a drifting larva or spore. How far they travel — and which reefs talk to which — decides how kelp recovers.
Dr. Mara Ellison ·
Encyclopedia7 min read
Little Penguin (Eudyptula minor): The Smallest Penguin of the Kelp Coasts
About a kilogram of slate-blue determination, the little penguin fishes southern Australia's kelp coasts by day and comes ashore by dark. Meet Eudyptula minor.
Dr. Mara Ellison ·
Blue Carbon8 min read
Mangrove Blue Carbon 101: The Original Coastal Carbon Market
Mangroves built the blue carbon market. How mangrove credits work, why restoration projects fail, and what separates a good project from a bad one.
Dr. Mara Ellison ·
Careers9 min read
Marine Environmental Consulting: What the Job Actually Is
Marine consultancies run the surveys and assessments behind every coastal project. Here's the daily work, the seasonal rhythm, and the honest trade-offs.
Dr. Mara Ellison ·
Science9 min read
The Fungi of the Kelp Forest: Hidden Partners and Emerging Pathogens
Fungi live inside kelp blades, partner with seaweeds and, as oceans warm, sometimes turn pathogenic. What marine mycology knows — and what it means for farms and reefs.
Dr. Mara Ellison ·
Careers10 min read
Careers in Marine Photogrammetry: Mapping Reefs in 3D for a Living
Reef photogrammetry turns overlapping photos into centimetre-scale 3D habitat maps. Here's how the field works, the skills it takes, and who hires for it.
Dr. Mara Ellison ·
Science9 min read
Designing Marine Protected Areas That Kelp Forests Can Actually Use
Reserve design is arithmetic: how big, how far apart, which reefs. The principles that decide whether an MPA network actually saves kelp forests.
Dr. Mara Ellison ·
Atlas9 min read
Marion Island: Kelp, Mice and Albatross in the Roaring Forties
A volcanic subantarctic outpost ringed by giant kelp, albatross skies and elephant-seal beaches — and the mice that threatened it all. An atlas guide.
Dr. Mara Ellison ·
Science8 min read
The Microbial Loop: How the Ocean's Smallest Life Recycles Everything
Most of the ocean's carbon never gets bitten by anything. Meet the microbial loop — the invisible recycling circuit that turns leaks and corpses back into food.
Dr. Mara Ellison ·
Science10 min read
Microplastics in Kelp Forests: What We Know and Don't
Tiny plastic fragments have reached every ocean habitat, kelp forests included. What the evidence shows about microplastics on reefs — and the honest gaps.
Dr. Mara Ellison ·
Science9 min read
Microplastics in the Kelp Forest: Sources, Exposure and What the Monitoring Actually Says
What do microplastic monitoring programs actually measure on kelp coasts — and what do the results say? Sources, exposure pathways and the honest state of the data.
Dr. Mara Ellison ·
Encyclopedia8 min read
Moon Jelly: The Calm Bloom That Sometimes Isn't
Why do moon jellies suddenly fill a kelp bay in their thousands? The science of jellyfish blooms — what triggers them, what they mean, when to worry.
Dr. Mara Ellison ·
Encyclopedia8 min read
Moonglow Anemone (Anthopleura artemisia): The Buried Anemone of Sand and Rock Seams
Moonglow anemone (Anthopleura artemisia) species profile: the gravel-coated anemone that buries its column in sediment beneath rocks, and how to find it.
Dr. Mara Ellison ·
Encyclopedia8 min read
Morning Sun Star: The Sea Star That Eats Other Sea Stars
With up to sixteen arms and a taste for other sea stars, the morning sun star is the kelp forest's fastest hunter — and a weathervane of sea star wasting.
Dr. Mara Ellison ·
Encyclopedia7 min read
Mossy Chiton: The Eight-Plated Grazer with a Hairy Girdle
The mossy chiton is a surf-swept grazer in eight overlapping plates, its girdle bristling like a tiny hedgehog. Meet Mopalia muscosa of the rocky shore.
Dr. Mara Ellison ·
Science9 min read
Marine Protected Areas That Talk to Each Other: The Science of Networks
A single marine reserve protects what lives inside it. A network of reserves, sized and spaced for drifting larvae, can protect a whole coastline. Here's the science.
Dr. Mara Ellison ·
Blue Carbon8 min read
Nature-Positive Claims: A Buyer's Guide to Credible Language
'Nature positive' is everywhere and defined almost nowhere. Here's what the term actually means, what a credible claim requires, and the red flags of nature greenwash.
Dr. Mara Ellison ·
Encyclopedia7 min read
Northern Fur Seal (Callorhinus ursinus): The Oceangoing Seal That Visits the Kelp Coast
Northern fur seals spend most of their lives far offshore, then crowd onto island beaches to breed. Range, deep diving, the fur trade's shadow and recovery.
Dr. Mara Ellison ·
Atlas12 min read
Nova Scotia: Kelp Beds of the North Atlantic
A guide to Nova Scotia's kelp beds of the North Atlantic — the species, the urchin wars, the invaders, the warming, and where to see kelp today.
Dr. Mara Ellison ·
Encyclopedia9 min read
New Zealand Sea Lion (Rāpoka): The Rarest Sea Lion in the Surf
Rāpoka, the New Zealand sea lion, is one of the world's rarest sea lions — a subantarctic breeder slowly recolonising the mainland coast. Its biology and comeback story.
Dr. Mara Ellison ·
Science10 min read
Why the Ocean Changes Colour: Chlorophyll From Space
Why the sea turns green, turquoise or milky — and how ocean-colour satellites read chlorophyll from orbit to map blooms, currents and ocean life.
Dr. Mara Ellison ·
Science11 min read
Ocean Gliders: Slow Robots, Long Missions
Ocean gliders ride buoyancy, not propellers, for months at sea. How these slow torpedo-shaped robots survey storms, currents and kelp coasts on sips of power.
Dr. Mara Ellison ·
Careers8 min read
Ocean Sound Analyst Careers: Listening to the Sea for a Living
Careers in ocean acoustics and bioacoustics — hydrophones, soundscape analysis, machine learning on whale calls, employers, training and pay, honestly laid out.
Dr. Mara Ellison ·
Science9 min read
Turbidity: What a Storm Does to the Light Kelp Needs
Storms turn coastal water murky, dimming the light kelp depends on. How turbidity works, where the sediment comes from, and how long forests stay in the dark.
Dr. Mara Ellison ·
Encyclopedia8 min read
Opaleye: The Blue-Eyed Grazer of the Shallow Kelp
The opaleye is a herbivorous sea chub with opal-blue eyes that shapes California's shallow reefs from tidepools to kelp edges. Biology, diet and ecology.
Dr. Mara Ellison ·
Atlas12 min read
The Otago Peninsula: Royal Albatross Above, Bull Kelp Below
The Otago Peninsula stacks a mainland albatross colony, sea lions and penguins above forests of giant kelp and rimurapa. A guide to New Zealand's wildlife headland.
Dr. Mara Ellison ·
Science8 min read
Do Kelp Forests Make the Oxygen We Breathe? What the Budget Says
A little, briefly, and mostly repaid by dusk. The honest math of kelp's oxygen, the atmosphere's vast bank, and why the air won't notice.
Dr. Mara Ellison ·
Encyclopedia9 min read
Pacific Barracuda: The Kelp Forest's Silver Arrow
The Pacific barracuda (Sphyraena argentea) hunts in silver schools over California kelp beds. Profile: biology, range, fishery and how it differs from its tropical cousin.
Dr. Mara Ellison ·
Encyclopedia8 min read
Pacific Hagfish: The Slimy Deep-Sea Cleaner of the Kelp Coast
The Pacific hagfish (Eptatretus stoutii) is a jawless, knot-tying deep-sea scavenger whose legendary slime and midnight carcass work keep the seafloor clean.
Dr. Mara Ellison ·
Encyclopedia9 min read
Pacific Lamprey: The Ancient Traveller Between River and Kelp Coast
Pacific lamprey (Entosphenus tridentatus) is a 450-million-year-old jawless fish that spends years as a filter-feeding larva, hunts the ocean, then returns home.
Dr. Mara Ellison ·
Encyclopedia8 min read
Pacific Sand Lance (Ammodytes personatus): The Buried Forage Fish of the Kelp Edge
Profile of the Pacific sand lance: a pencil-thin forage fish that buries itself in sand beside the kelp forest and feeds seabirds, salmon and whales. Facts and ecology.
Dr. Mara Ellison ·
Encyclopedia10 min read
Pacific Sardine: The Silver River That Feeds the Kelp Coast
Pacific sardine: the ecology of Sardinops sagax, its great twentieth-century collapse and recovery, and why this small fish feeds the whole kelp coast.
Dr. Mara Ellison ·
Encyclopedia9 min read
Pink Abalone (Haliotis corrugata): The Corrugated Architect of Baja's Kelp Edge
Pink abalone built Baja California's most storied shellfish fishery, then nearly vanished with the kelp. Inside the cooperative-led fight to bring them back.
Dr. Mara Ellison ·
Encyclopedia8 min read
Pinto Abalone: The Northern Grazer Fighting Its Way Back
Hunted to near-collapse, the pinto abalone is being rebuilt by hatcheries and divers in the Salish Sea. Inside North America's meticulous abalone comeback.
Dr. Mara Ellison ·
Encyclopedia9 min read
Plumose Anemone (Metridium): Species Profile
Plumose anemones turn cold kelp-coast rock, wrecks and pilings into white forests of feathery tentacles. Meet Metridium, the towering filter feeder.
Dr. Mara Ellison ·
Atlas8 min read
Point Loma: San Diego's Giant Kelp Forest at the City's Edge
The Point Loma kelp forest off San Diego is one of the largest and most-studied giant kelp beds on Earth — a story of pollution, recovery and scientific devotion.
Dr. Mara Ellison ·
Atlas9 min read
Portland to Discovery Bay: Windblown Kelp of Western Victoria
Western Victoria's Portland coast mixes Australia’s only mainland gannet colony, summer blue whales and golden kelp beds fed by the Bonney upwelling.
Dr. Mara Ellison ·
Atlas8 min read
The Pribilof Islands: Kelp in the Middle of the Bering Sea
Four volcanic islands on the Bering Sea shelf — half the world's northern fur seals, millions of seabirds, sea ice to the doorstep, and kelp along the rims.
Dr. Mara Ellison ·
Encyclopedia8 min read
Purple Shore Crab (Hemigrapsus nudus): The Red-Spotted Scavenger
The purple shore crab is the little purple scavenger under nearly every rock on Pacific rocky shores — a key cleaner linking the kelp forest to the tide line.
Dr. Mara Ellison ·
Encyclopedia8 min read
Rainbow Star (Orthasterias koehleri): The Red-and-Orange Predator of Kelp Reefs
Rainbow star (Orthasterias koehleri): a red-and-orange sea star of Pacific kelp reefs that eats snails, clams and even small sea urchins.
Dr. Mara Ellison ·
Encyclopedia8 min read
Red Octopus: The Patchwork Hunter of the Kelp Forest Night
Red octopus dens stitch a kelp reef together: midden maps, den real estate, Jervis Bay octopus cities and the reef's patchwork of night hunters.
Dr. Mara Ellison ·
Encyclopedia9 min read
Red Rock Crab (Cancer productus): The Heavy Hand at the Kelp's Edge
Cancer productus owns the rocky shallows of the Pacific coast: crushing claws, black-tipped pincers, and a quiet role policing urchins. ID, biology, fishery.
Dr. Mara Ellison ·
Science8 min read
The Sound of a Healthy Reef: Acoustic Monitoring and Ocean Soundscapes
Healthy kelp forests crackle, rasp and croak. Researchers now eavesdrop with hydrophones to judge reef health — and even use sound as a restoration tool.
Dr. Mara Ellison ·
Blue Carbon12 min read
Eyes in the Sky: Remote Sensing for Kelp and Blue Carbon
Satellites have tracked giant kelp canopies since the 1980s. How remote sensing maps kelp forests, feeds carbon accounting, and where the pixels stop short.
Dr. Mara Ellison ·
Encyclopedia8 min read
Rosy Rockfish (Sebastes rosaceus): Species Profile
Rosy rockfish (Sebastes rosaceus) is a small, pink-blotched rockfish of low rocky reefs from Washington to Baja. Identification, habitat, diet and ecology.
Dr. Mara Ellison ·
Encyclopedia9 min read
Saddleback Gunnel (Pholis ornata): The Eel-Lookalike of the Kelp Fringe
Meet the saddleback gunnel — the saddle-marked, eel-shaped shore fish of Pacific kelp edges, and how to tell it from true eels and its gunnel relatives.
Dr. Mara Ellison ·
Encyclopedia8 min read
Saithe (Coalfish): The Schooling Hunter of Norway's Kelp Edge
Pollachius virens grows up inside the kelp and hunts beyond it — the dark gadoid whose juveniles fill northeast Atlantic kelp forests every autumn.
Dr. Mara Ellison ·
Encyclopedia9 min read
Eccentric Sand Dollars: The Living Coins on the Kelp Forest Floor
Eccentric sand dollars crowd the sand beside Pacific kelp forests by the thousand — standing on edge to filter the water. Their biology, beds and neighbours.
Dr. Mara Ellison ·
Science8 min read
Ocean Colour from Space: How Satellites Read the Sea
Ocean colour satellites turn faint light reflected from the sea into maps of phytoplankton, sediment and kelp. How the sensors work, what they see — and what they miss.
Dr. Mara Ellison ·
Blue Carbon7 min read
Who Owns Blue Carbon? Tenure, Rights and the Sea
The ocean is not empty and neither are its rights. Tenure, jurisdiction and Indigenous sea country decide who can claim coastal carbon — before any science does.
Dr. Mara Ellison ·
Science7 min read
The Working Dive: How Sea Otters' Bodies Power a Lifetime in Cold Water
Sea otters dive 40-90 seconds at a time, all day, in cold water — with the densest fur of any mammal and one of the fastest metabolisms. Here's how the physiology works.
Dr. Mara Ellison ·
Encyclopedia8 min read
Sea Palm (Postelsia palmaeformis): The Intertidal Palm Tree Species Profile
The sea palm lives where waves hit hardest — a flexible-stiped kelp that bends with the swell. Its biology, mussel-bed alliance and why foraging it is wrong.
Dr. Mara Ellison ·
Science10 min read
Sea Star Wasting Disease: The Epidemic That Starved a Coast
From 2013, sea star wasting liquefied stars from Alaska to Mexico and erased the sunflower star, a keystone urchin predator. The science, and the kelp fallout.
Dr. Mara Ellison ·
Science9 min read
Seascape Connectivity: How Kelp, Seagrass and Estuaries Talk to Each Other
Kelp forests, seagrass meadows and estuaries trade food, animals and larvae across the coastal mosaic. Why connectivity — not patch size — decides resilience.
Dr. Mara Ellison ·
Farming10 min read
Early Warning Systems for Seaweed Disease: Monitoring Protocols That Work
Kelp disease moves faster than most farm visits. How to build a farm-level surveillance protocol — baseline, triggers, sampling cadence — that catches trouble early.
Dr. Mara Ellison ·
Blue Carbon12 min read
Reading the Core: How Sediment Sampling Measures Blue Carbon
Scientists measure blue carbon by coring the seabed. Here is how a sediment core is taken, dated and turned into the carbon numbers behind coastal credits.
Dr. Mara Ellison ·
Encyclopedia8 min read
Sheep Crab (Loxorhynchus grandis): The Giant Spider Crab of California Kelp
The California sheep crab is a slow, spiny giant of the kelp forest floor — a decorator crab that outgrew its disguise. Meet Loxorhynchus grandis.
Dr. Mara Ellison ·
Atlas9 min read
The Shetland Islands: Kelp, Otters and the North Atlantic Front
Shetland grows some of Britain's finest kelp forests: clear northern water, Eurasian otters and an intact sea culture on the North Atlantic front.
Dr. Mara Ellison ·
Encyclopedia8 min read
Shore Crab (Carcinus maenas): Survivor at the Kelp's Edge — and Invader Abroad
Carcinus maenas is Europe's toughest shore crab — a kelp-edge scavenger at home and one of the world's most consequential marine invaders everywhere else.
Dr. Mara Ellison ·
Encyclopedia9 min read
Shovelnose Guitarfish: Half Shark, Half Ray, Fully Kelp-Coast
Pseudobatos productus cruises the sandy flats between kelp forests from California to Baja. How to identify it, what it eats, and why its fate splits at the border.
Dr. Mara Ellison ·
Atlas8 min read
Sicily: The Mediterranean's Great Algal Forests Around Volcanic Isles
Sicily's volcanic islands carry the Mediterranean's richest Cystoseira forests — brown canopies in coral-clear water. A coastal atlas guide to seeing them.
Dr. Mara Ellison ·
Atlas11 min read
The Snares and Antipodes: New Zealand's Subantarctic Kelp Wilderness
A coastal atlas guide to New Zealand's subantarctic islands — surf-gripped bull kelp, endemic penguins and parakeets, sea lion recovery, and the mouse eradication that worked.
Dr. Mara Ellison ·
Field Notes8 min read
Field Notes: The Sonar Anomaly We Mapped at Mendocino
A routine Drifter survey off Mendocino returned a signature that matched no chart: hard reef where the map said sand. Field notes on what we found below.
Dr. Mara Ellison ·
Science8 min read
Sounding Out a Forest: How Sonar Maps Kelp Reefs
Multibeam and sidescan sonar build metre-scale maps of reef relief, substrate and kelp canopy. How acoustic mapping works, and what it can and can't see.
Dr. Mara Ellison ·
Encyclopedia10 min read
South American Sea Lion (Otaria byronia): Species Profile
A species profile of the South American sea lion, the maned beachmaster of the Humboldt and Patagonian kelp coasts — biology, range and fishery friction.
Dr. Mara Ellison ·
Encyclopedia10 min read
Southern Right Whale: The Whale That Plays in Kelp
The southern right whale is a slow, southern giant with a calloused head — and a documented habit of draping itself in kelp. Its biology, recovery and kelp play.
Dr. Mara Ellison ·
Encyclopedia8 min read
Spanish Shawl (Flabellinopsis iodinea): The Kelp Forest's Flame
The Spanish shawl Flabellinopsis iodinea is a purple-and-orange aeolid nudibranch that steals stinging cells from hydroids. Identification, diet, habitat.
Dr. Mara Ellison ·
Science11 min read
Modelling the Future Forest: Kelp Distribution Models Explained
How scientists combine survey records, satellite data and climate projections to map where kelp grows today — and forecast where forests will survive in 2050.
Dr. Mara Ellison ·
Atlas7 min read
St Abbs to Eyemouth: Scotland's Voluntary Marine Reserve and Its Kelp Reefs
On the Berwickshire coast, one of Britain's first voluntary marine reserves protects tangle kelp forest, wolf-fish dens and clear North Sea water.
Dr. Mara Ellison ·
Science9 min read
Reading Diets in Isotopes: How Carbon and Nitrogen Ratios Trace Kelp Food Webs
Carbon and nitrogen isotope ratios let ecologists read what reef animals actually ate — and whether kelp carbon reached them. Here's how the method works.
Dr. Mara Ellison ·
Encyclopedia8 min read
Staghorn Sculpin (Leptocottus armatus): Antler-Spined Hunter of Tidal Creeks
The staghorn sculpin cruises Pacific estuaries from Alaska to Baja, tolerates fresh water, and carries venomous antler-like spines on its head.
Dr. Mara Ellison ·
Encyclopedia10 min read
Steller Sea Lion: The Tonne of Muscle Above the Kelp Line
The Steller sea lion is the largest of the eared seals — a tonne of muscle-hauling out beside North Pacific kelp forests. Its biology, range and hard-won recovery.
Dr. Mara Ellison ·
Atlas7 min read
Strait of Georgia: Kelp, Islands and Estuary Water Between Vancouver Island and the Mainland
Between Vancouver Island and the BC mainland, the Fraser River's plume shapes bull kelp beds, herring spawns and whale water. A coastal atlas guide.
Dr. Mara Ellison ·
Encyclopedia8 min read
Stubby Rose Anemone: A Cold-Water Rose of Rock and Cobble
Stubby rose anemone (Urticina coriacea) species profile: a leathery, crimson anemone of northern rock and cobble, from Arctic seas to California kelp forests.
Dr. Mara Ellison ·
Atlas9 min read
Svalbard: Kelp Forests in the High Arctic
At 78°N, Svalbard's fjords hold kelp forests in polar light, growing under sea ice and beside glaciers. A guide to the High Arctic's underwater forests — and what's changing.
Dr. Mara Ellison ·
Atlas9 min read
Sydney's Coast: The Crayweed Comeback Story
Sydney lost its crayweed forests to sewage in the 1980s — then brought them back. A guide to the city's kelp, golden kelp meadows and dive reefs.
Dr. Mara Ellison ·
Atlas11 min read
Taiwan's Northeast Coast: Kelp, Longdong and the Kuroshio Edge
Where the warm Kuroshio meets the southern limit of the kelp world — Sargassum forests, agar harvesters, the Longdong diving coast and Keelung's protected reefs.
Dr. Mara Ellison ·
Atlas9 min read
Tristan da Cunha: Kelp Around the Loneliest Island
Giant kelp forests, rockhopper penguins and a lobster fishery that funds a town: a guide to Tristan da Cunha, the South Atlantic's most remote kelp coast.
Dr. Mara Ellison ·
Science9 min read
Turbidity and Kelp: Why Muddy Water Starves a Forest of Light
Suspended sediment has quietly shrunk some of the world's kelp forests. How turbidity works, how sedimentation smothers recruits, and how clarity returns.
Dr. Mara Ellison ·
Science11 min read
Sound Underwater: How the Ocean Carries Noise
Underwater, sound is the only sense that travels. How sound speed works in seawater, what the SOFAR channel is, and why the ocean is far noisier than it seems.
Dr. Mara Ellison ·
Encyclopedia8 min read
Vermilion Rockfish (Sebastes miniatus): Species Profile
The vermilion rockfish is a deep-bodied red rockfish of the mid-water reef zone. Identification, biology, barotrauma and the fishery story.
Dr. Mara Ellison ·
Atlas9 min read
Vancouver Island's Wild West Coast: Kelp, Surge and the Edge of the Shelf
Beyond the famous sounds lie full-swell reefs, shelf-edge upwelling and wilderness kelp. A guide to Vancouver Island's outer coast — and how to reach it.
Dr. Mara Ellison ·
Atlas8 min read
Western Port: A Bay of Mangrove, Seagrass and Drift Kelp
Western Port, Victoria's second bay, pairs Australia's southern mangroves with vast seagrass flats, million-strong shorebird migrations and tide-borne kelp.
Dr. Mara Ellison ·
Encyclopedia10 min read
White Sea Bass (Atractoscion nobilis): The Ghost of the Kelp Forest
The white sea bass is California's great croaker — a metre-and-a-half predator of kelp edge and open water, nearly lost, fighting back. Biology, fishery and comeback.
Dr. Mara Ellison ·
Encyclopedia7 min read
White Sea Urchin (Lytechinus pictus): The Gentle Cousin of the Purple Horde
Pale, decorator-clad and living on open sand rather than reef: how the white sea urchin feeds, spreads and quietly differs from its barren-making relatives.
Dr. Mara Ellison ·
Encyclopedia8 min read
White-Spotted Rose Anemone (Urticina lofotensis): The Kelp Forest's Strawberry
White-spotted rose anemone (Urticina lofotensis) species profile: a scarlet anemone dotted with white, named for Norway's Lofoten islands and common on kelp-coast walls.
Dr. Mara Ellison ·
Atlas8 min read
Wilsons Promontory: Kelp Forests at Mainland Australia's Southern Tip
A region guide to Wilsons Promontory — granite reefs, cold Bass Strait water, crayweed and common kelp forests, fur seals and how to visit the Prom's marine parks.
Dr. Mara Ellison ·
Science8 min read
Withering Syndrome: Anatomy of an Abalone Disease in a Warming Ocean
Withering syndrome has killed millions of abalone since the 1980s — a bacterial disease switched on by warm water. The science of the pathogen and outbreaks.
Dr. Mara Ellison ·
Encyclopedia9 min read
Yelloweye Rockfish (Sebastes ruberrimus): The Century-Old Resident of the Reef Edge
Yelloweye rockfish can live more than a century on a single reef. Identification, the barotrauma problem, and the rules helping this red giant recover.
Dr. Mara Ellison ·
Atlas10 min read
The Aleutian Islands: Where Science Learned What Otters Are For
A 1,900-kilometre arc of volcano, fog and kelp strung between Alaska and Siberia — the coastline that taught ecologists how sea otters hold kelp forests together.
Dr. Mara Ellison ·
Encyclopedia8 min read
Black Abalone (Haliotis cracherodii): Species Profile and Recovery
Black abalone once blanketed California's rocky intertidal, then disease and poaching erased most of them. Inside an unlikely marine recovery story.
Dr. Mara Ellison ·
Encyclopedia8 min read
Black Oystercatcher: The Rocky-Shore Sentinel
Black oystercatcher Haematopus bachmani: the rock-loving sentinel of the Pacific coast — habits, tiny population and what it reveals.
Dr. Mara Ellison ·
Encyclopedia7 min read
Black Oystercatcher: Sentinel of the Rocky Shore
The black oystercatcher lives its whole life on kelp-fringed rock, hammering limpets and mussels. Ecology, bill lore, breeding and its role as an indicator.
Dr. Mara Ellison ·
Encyclopedia8 min read
Blue Rockfish (Sebastes mystinus): The Schooling Sentinel of Pacific Kelp Forests
The blue rockfish (Sebastes mystinus) is a blue-black schooling mainstay of Pacific kelp forests. Biology, fishery and what its presence tells us.
Dr. Mara Ellison ·
Encyclopedia8 min read
Bluebanded Goby (Lythrypnus dalli): Species Profile
The bluebanded goby is a thumb-length fish in neon red and electric blue, and it can change sex both ways. Meet California's most dazzling reef resident.
Dr. Mara Ellison ·
Encyclopedia9 min read
Brittle Stars of the Kelp Forest: A Group Profile
Brittle stars are the kelp forest's most numerous residents — five-armed floor-dwellers by the thousand. Learn how they differ from sea stars and why they matter.
Dr. Mara Ellison ·
Encyclopedia8 min read
California Sea Lion (Zalophus californianus): Species Profile
California sea lions are the kelp coast's most boisterous residents — acrobatic, intelligent and climate-sensitive. Ecology, biology and the Channel Islands nursery.
Dr. Mara Ellison ·
Encyclopedia8 min read
Dungeness Crab: The Kelp-Edge Wanderer With a Famous Name
Dungeness crab species profile: the life cycle from drifting larva to fishing pot, sand-flat and kelp-edge habitat, moulting growth and fishery stewardship.
Dr. Mara Ellison ·
Science10 min read
Mapping a Forest With Sound: Echosounders and the 3D Shape of Kelp
Echosounders see the part of a kelp forest satellites and divers can't — its living volume. How hydroacoustic surveys map canopy height, density and biomass.
Dr. Mara Ellison ·
Science8 min read
eDNA Surveys: Reading an Entire Kelp Forest from a Bottle of Seawater
Environmental DNA lets scientists census a kelp forest from a few litres of seawater. How eDNA surveys work, what they miss, and why they matter.
Dr. Mara Ellison ·
Science9 min read
El Niño and Kelp: What Happens When the Pacific Warms
Every few years the Pacific reorganises itself and kelp forests pay the price. How El Niño starves kelp — and how La Niña's cool afterwash lets it recover.
Dr. Mara Ellison ·
Encyclopedia8 min read
Giant Green Anemone (Anthopleura xanthogrammica): Species Profile
The giant green anemone is a solar-powered predator of Pacific tidepools and kelp-forest edges. Its biology, symbiosis and decades-long life.
Dr. Mara Ellison ·
Atlas10 min read
Haida Gwaii: Kelp Forests at the Edge of the Continent
Ninety kilometres of black ocean off northern British Columbia, an archipelago of giant kelp, ancient villages and Haida co-management — kelp country at its most sovereign.
Dr. Mara Ellison ·
Encyclopedia8 min read
Harbour Seal (Phoca vitulina): Species Profile
The harbour seal is the temperate kelp coast's most widespread pinniped — a shy true seal found from California to the Baltic. Facts, ecology and how to watch them.
Dr. Mara Ellison ·
Blue Carbon9 min read
How Kelp Stores Carbon: The Science, the Sinks, and the Open Questions
Kelp grows as fast as any forest on Earth, but where does its carbon actually go? The genuine science, the real sinks and the honest uncertainties.
Dr. Mara Ellison ·
Blue Carbon10 min read
Measuring Kelp Carbon at Sea: Canopy Maps to Credit Issuance
Follow kelp carbon from satellite canopy map to verified credit: the fieldwork, biomass models, fate tracing and audits behind blue carbon MRV at sea.
Dr. Mara Ellison ·
Science7 min read
The Kelp Forest Food Web: Who Eats What
A map of the kelp forest food web — from drifting fronds and grazing urchins to otters, octopus and rockfish — and why detritus powers most of it.
Dr. Mara Ellison ·
Encyclopedia9 min read
Lingcod (Ophiodon elongatus): Species Profile
The lingcod is not a cod at all — a big-headed, voracious ambush predator of Pacific kelp reefs, famous for blue-green flesh and fiercely guarded nests.
Dr. Mara Ellison ·
Science8 min read
How Marine Invasions Spread: Ballast, Hulls and Floating Plastic
How marine invasive species spread: ballast water, hull fouling, aquaculture escapes and plastic rafting — the vectors, and why some coasts are vulnerable.
Dr. Mara Ellison ·
Science6 min read
Marine Protected Areas: What They Protect and How
MPAs, marine reserves, no-take zones explained — how protection levels differ, what the evidence shows, and what MPAs can and can't do for kelp forests.
Dr. Mara Ellison ·
Encyclopedia8 min read
Ochre Sea Star (Pisaster ochraceus): The Keystone Predator of Rocky Shores
A field guide to finding the ochre sea star, reading the mussel line it maintains, and understanding what its recovery after wasting disease tells us.
Dr. Mara Ellison ·
Atlas8 min read
Port Phillip Bay: Melbourne's Giant Kelp Garden
Behind the treacherous Rip lies a 1,900 km² sunken valley of kelp beds and seagrass: Port Phillip Bay, the temperate reef at Melbourne's front door.
Dr. Mara Ellison ·
Atlas9 min read
Scotland's West Coast: Kelp Forests of the Hebrides
Sea lochs, tidal sound races and a kelp-burning past: a guide to the kelp forests of Scotland's west coast and the Hebrides, and where the industry is heading next.
Dr. Mara Ellison ·
Encyclopedia8 min read
Sieve Kelp (Agarum clathratum): The Perforated Puzzle of the Arctic Reef
Sieve kelp (Agarum clathratum) wears a blade full of holes nobody has fully explained — biology of this Arctic kelp and the riddle of the holes.
Dr. Mara Ellison ·
Encyclopedia9 min read
Southern Rock Lobster (Jasus edwardsii): Species Profile
Southern rock lobster (Jasus edwardsii) is the reef's top urchin predator. Its biology, fishery and role in stopping barrens — a species profile.
Dr. Mara Ellison ·
Atlas8 min read
Stewart Island / Rakiura: New Zealand's Southern Kelp
Bladder kelp beds, a storied pāua fishery, tea-coloured inlets and daylight kiwi: a guide to Stewart Island/Rakiura, New Zealand's southern kelp coast.
Dr. Mara Ellison ·
Encyclopedia9 min read
Sunflower Sea Star (Pycnopodia helianthoides): Species Profile
The sunflower sea star was the kelp forest's great urchin hunter. Wasting disease erased billions of them — and the consequences reshaped coastlines.
Dr. Mara Ellison ·
Encyclopedia7 min read
Tiger Rockfish: The Banded Hermit of Deep Reef Edges
The tiger rockfish is a long-lived, vividly banded Pacific rockfish of deep rocky reefs and deep kelp-forest edges — beautiful, slow-growing and easily overlooked.
Dr. Mara Ellison ·
Science9 min read
Trophic Cascades in Kelp Forests: How Sea Otters Keep Forests Standing
A trophic cascade happens when a predator's removal rewrites an entire ecosystem. The sea otter–urchin–kelp story is ecology's classic case — here's how it works.
Dr. Mara Ellison ·
Encyclopedia9 min read
Wolf Eel (Anarrhichthys ocellatus): Species Profile
The wolf eel is not an eel and nothing to fear — a devoted, den-dwelling wolffish that crushes sea urchins for a living and guards its eggs for months.
Dr. Mara Ellison ·
Encyclopedia8 min read
Common Eider (Somateria mollissima): The Sea Duck of Northern Kelp Coasts
Meet the common eider: the northern sea duck that dives for mussels in the kelp shallows, crushes shells whole and gave its down to a centuries-old harvest.
Dr. Mara Ellison ·
Encyclopedia9 min read
Lacuna Kelp Snail: The Blade-Grazing Gardener Nobody Notices
Lacuna vincta, the chink-shell kelp snail, lives its whole life on kelp blades — sometimes a helpful gardener, sometimes a grazer that can riddle a farm.
Dr. Mara Ellison ·
Encyclopedia7 min read
Marbled Murrelet: The Seabird That Nests in Trees
The marbled murrelet feeds in kelp-fringed seas and nests miles inland on old-growth limbs. The ecology of a seabird split between two vanishing worlds.
Dr. Mara Ellison ·
Careers9 min read
Marine Conservation Careers: The Honest Map of Routes In
Marine conservation careers span rangers, policy staff, restoration crews and data scientists. Here is an honest map of the routes in, the pay, and the skills that matter.
Dr. Mara Ellison ·
Science8 min read
Spillover: Do Fish Really Walk Out of Marine Reserves?
Marine reserve spillover explained: how protected waters export adult fish and larvae to fishing grounds, what the evidence shows and when benefits appear.
Dr. Mara Ellison ·
Encyclopedia8 min read
California Market Squid: The Boom-and-Bust Fishery Under the Canopy
California market squid: the boom-and-bust fishery that whitens the seafloor with egg mops and feeds half the coastal food web.
Dr. Mara Ellison ·
Encyclopedia8 min read
New Zealand Fur Seal (Arctocephalus forsteri): Species Profile
Kekeno — the New Zealand fur seal — was hunted nearly to extinction by the early 1800s, then recovered under protection. Ecology, biology and where to see them.
Dr. Mara Ellison ·
Encyclopedia8 min read
Pacific Electric Ray: Fifty Volts in the Kelp Forest's Sand Channels
Tetronarce californica, the Pacific electric ray, carries up to ~50 volts in its wings. Biology, the ambush, and what to do if you meet one on a night dive.
Dr. Mara Ellison ·
Encyclopedia6 min read
Umbrella Crab: Kelp's Shape-Shifting Hermit of the Canopy
The umbrella crab hides its legs beneath a flared, kelp-coloured carapace, drifting undetected across the holdfasts and rocky floors of Pacific kelp forests.
Dr. Mara Ellison ·
Atlas9 min read
Chile's Humboldt Coast: The World's Richest Kelp Frontier
Explore Chile's Humboldt Current coast: relentless upwelling, Lessonia and giant kelp beds, the cochayuyo harvest tradition, and the pressures reshaping 4,000 km of reef.
Dr. Mara Ellison ·
Field Notes8 min read
Counting Otters at Catalina: A Dawn Colony-Watch and What the Numbers Told Us
Sea otters are strangers at Catalina — so when one appeared over Tidewright's restoration block, we built a dawn count around him. What the survey found.
Dr. Mara Ellison ·
Encyclopedia8 min read
Fish-Eating Anemone: The Velvet Trap Beneath the Kelp
Fish-eating anemone (Urticina piscivora) species profile: the big red anemone that catches fish under the kelp canopy and doubles as sea star prey.
Dr. Mara Ellison ·
Encyclopedia8 min read
Five-Ribbed Kelp (Costaria costata): The Wide Blade of the North Pacific
Five-ribbed kelp (Costaria costata) is the wide, ripple-edged kelp of northeast Pacific reefs — biology, kitchen uses and how it differs from wakame.
Dr. Mara Ellison ·
Encyclopedia8 min read
Kelp Bass (Paralabrax clathratus): Species Profile
Kelp bass — calico bass to the anglers who love them — are the signature sportfish of the kelp canopy. Biology, slow growth, sex change and sustainable fishing.
Dr. Mara Ellison ·
Encyclopedia7 min read
Leafy Seadragon (Phycodurus eques): Species Profile
The leafy seadragon is the most perfectly disguised fish in the sea. Explore its South Australian strongholds, brooding males and fragile future.
Dr. Mara Ellison ·
Careers8 min read
Becoming a Marine Mammal Observer: The Job Watching for Whales
Marine mammal observers watch for whales and dolphins around offshore construction and seismic work. Training, certification, pay and how to break in.
Dr. Mara Ellison ·
Encyclopedia7 min read
Pacific Tube Anemone: The Flower of the Forest's Sandy Floor
The Pacific tube anemone isn't a true anemone at all. Meet Pachycerianthus fimbriatus: the felt-tubed, double-crowned ambush fisher of kelp-forest sand flats.
Dr. Mara Ellison ·
Encyclopedia7 min read
Reef Surfperch (Micrometrus aurora): The Surf Zone's Quiet Resident
Small, barred and easy to overlook, the reef surfperch works the noisy seam where kelp forest meets breaking surf — and gives birth to fully formed young.
Dr. Mara Ellison ·
Encyclopedia8 min read
Aggregating Anemone: The Clone Army of the Rocky Shore
Aggregating anemone (Anthopleura elegantissima) species profile: clonal armies, tentacle wars, symbiotic algae and survival at the top of the rocky shore.
Dr. Mara Ellison ·
Atlas9 min read
Kelp Coasts of the Baltic Sea: Seaweeds at the Edge of Salinity
A coastal atlas guide to the Baltic Sea, where salinity drops below what most kelp can survive and bladderwrack forests rule a brackish inland sea.
Dr. Mara Ellison ·
Encyclopedia8 min read
Buffalo Sculpin (Enophrys bison): The Horned Ambush Hunter of Kelp Beds
Profile of the buffalo sculpin — its jutting preopercular spines, reported venom, bright guarded egg masses and life in northeast Pacific kelp beds.
Dr. Mara Ellison ·
Encyclopedia8 min read
California Sheephead (Semicossyphus pulcher): Species Profile
The California sheephead is a sex-changing kelp-forest wrasse whose jaws keep sea urchins in check. Learn its life history, role and recovery story.
Dr. Mara Ellison ·
Encyclopedia8 min read
Kina (Evechinus chloroticus): New Zealand's Endemic Sea Urchin — Species Profile
Kina is Aotearoa's endemic sea urchin — treasured kaimoana, a kelp grazer, and the engineer behind New Zealand's barren reefs. Here is its biology and its story.
Dr. Mara Ellison ·
Careers7 min read
Careers in Marine Policy: Law, Treaties and Ocean Governance
Marine policy careers put lawyers, negotiators and analysts at the table where the ocean's future is decided. A map of the field and the roads in.
Dr. Mara Ellison ·
Blue Carbon8 min read
Nature Credits vs Carbon Credits: Two Ledgers for One Ocean
Carbon credits count tonnes; nature credits count living complexity. How the two markets differ, overlap and collide — and how honest projects keep the ledgers straight.
Dr. Mara Ellison ·
Atlas10 min read
Pembrokeshire: Kelp, Islands and Tidal Races on the Welsh Frontier
Pembrokeshire's jagged peninsula holds Britain's only full marine conservation zone, tide-swept kelp beds and island seas rich with birds and seals. A coastal atlas guide.
Dr. Mara Ellison ·
Atlas10 min read
Península Valdés: Kelp, Whales and the Argentine Sea
Península Valdés pairs Patagonia's most famous whale nursery with giant kelp beds at the edge of the steppe — plus one of the kelp world's sharpest invasion stories.
Dr. Mara Ellison ·
Encyclopedia8 min read
Purple Sea Urchin (Strongylocentrotus purpuratus): Species Profile
The purple sea urchin turned patches of California kelp forest into barrens. Learn its biology, its hidden hunger, and why it is both villain and victim.
Dr. Mara Ellison ·
Encyclopedia8 min read
Sea Otter (Enhydra lutris): The Keystone That Holds Kelp Forests Together
Sea otters eat a quarter of their body weight a day — much of it sea urchins. How this small predator became the kelp forest's most famous keystone species.
Dr. Mara Ellison ·
Encyclopedia8 min read
Shag Rug Nudibranch (Aeolidia papillosa): The Anemone Hunter in a Grey Coat
Meet Aeolidia papillosa, the shag rug nudibranch: a cold-water sea slug that hunts anemones, steals their stinging cells and wears them as armour.
Dr. Mara Ellison ·
Encyclopedia9 min read
Wakame (Undaria pinnatifida): Edible Native and Global Invader
Wakame is a beloved edible kelp in Japan and Korea — and one of the world's most widespread invasive seaweeds. Understand both sides of Undaria pinnatifida.
Dr. Mara Ellison ·
Field Notes8 min read
Field Notes: Counting the Neighbourhood Inside a Holdfast
Inside a kelp holdfast census at Tinderbox: bagging, sieving and counting the hundreds of small animals that tell us whether a restored reef is alive.
Dr. Mara Ellison ·
Encyclopedia8 min read
Giant Sea Bass (Stereolepis gigas): Species Profile and Comeback
The giant sea bass is a 250-kilo shadows-and-kelp predator that fishermen nearly erased. Learn its biology, the crash and the slow comeback now unfolding.
Dr. Mara Ellison ·
Encyclopedia8 min read
Giant Sea Bass (Stereolepis gigas): The Gentle Giant of the Kelp Forest
In one generation, gillnets erased the giant sea bass from its kelp forests. Four decades of protection are bringing it back — one cautious shadow at a time.
Dr. Mara Ellison ·
Encyclopedia9 min read
Tubesnout: The Matchstick School of the Kelp Canopy
Meet the tubesnout, the matchstick-slim schooler of Pacific kelp canopies — a stickleback relative that nests on kelp and feeds half the birds.
Dr. Mara Ellison ·
Atlas8 min read
Kelp Forests of Catalina Island: A Coastal Atlas Guide
Catalina Island is southern California's kelp capital — Casino Point, Farnsworth Bank, warm-water giants and a century of marine science under the canopy.
Dr. Mara Ellison ·
Careers8 min read
How to Become a Marine Ecologist: Degrees, Fieldwork and First Jobs
Want a career studying kelp forests, reefs and ocean ecosystems? A realistic map of the degrees, fieldwork, skills and first jobs that lead into marine ecology.
Dr. Mara Ellison ·
Atlas9 min read
Rías Baixas: Kelp, Harvesters and the Galician Tide
A ría-by-ría field guide to Galicia's drowned southern estuaries — mussel rafts, sea-spaghetti kelps and the Cíes Islands, fed by one of the Atlantic's great upwellings.
Dr. Mara Ellison ·
Encyclopedia8 min read
Spiny Sun Star: A Cold-Water Many-Armed Opportunist
The spiny sun star is a many-armed predator of cold reefs in both northern oceans. How to identify Crossaster papposus, what it eats, and why it matters.
Dr. Mara Ellison ·
Field Notes8 min read
Field Notes: The Long Swim — Monitoring a Forest on Fin Power
Why Tidewright's sharpest fish census is a diver swimming 400 metres at dawn on fin power alone. A field note on roving-diver surveys off Tasmania.
Dr. Mara Ellison ·
Science9 min read
Holdfast Biomechanics: The Anchor Engineering of a Storm-Proof Seaweed
A kelp holdfast holds tonnes of drag through a storm with no glue and no roots. The biomechanics of nature's toughest anchor, and what engineers learn.
Dr. Mara Ellison ·
Science12 min read
Measuring Kelp Biomass: From Dive Tapes to Tonnes
How scientists turn diver counts, satellite pixels and allometric equations into honest kelp biomass estimates — and why every method carries a bias.
Dr. Mara Ellison ·
Atlas9 min read
The Great Southern Reef: Australia's Forgotten Kelp Continent
Australia has a second great reef — 8,000 km of temperate kelp forest across five states, more endemic than the Great Barrier Reef, and in serious trouble.
Dr. Mara Ellison ·
Science8 min read
Locked In: Why Urchin Barrens Are an Alternative Stable State
Urchin barrens can persist for decades even when kelp conditions return. Why barrens behave as an alternative stable state — and how reefs flip back.
Dr. Mara Ellison ·
Science7 min read
The Restoration Toolkit: What the Evidence Says About Rebuilding Kelp
Green gravel, seeded lines, urchin culling, spore bags, assisted migration — how the main kelp restoration methods compare on cost, scale and evidence of success.
Dr. Mara Ellison ·
Encyclopedia9 min read
Sharpnose Crab (Scyra acutifrons): The Decorator That Gardens Its Own Back
Meet the sharpnose crab — a small Pacific spider crab that plants living algae on hooked hairs across its shell. How the disguise works and where to find it.
Dr. Mara Ellison ·
Encyclopedia8 min read
Leafy Hornmouth (Ceratostoma foliatum): The Winged Snail of the Kelp Reef
Ceratostoma foliatum, the leafy hornmouth, is a winged predatory snail of Pacific kelp reefs — a slow driller of mussels and barnacles.
Dr. Mara Ellison ·
Science7 min read
How We Map the Seafloor: Multibeam, Sidescan, Satellites and Robots
Multibeam sonar, sidescan texture, satellite bathymetry and AUVs: how modern seafloor mapping works, what each tool can resolve, and why reefs need it.
Dr. Mara Ellison ·
Atlas8 min read
Esperance and the Recherche: Granite Islands, White Sand, Golden Kelp
A coastal atlas guide to Esperance, Western Australia: kelp forests beneath the whitest beaches in the country, granite islands, seadragons and how to see them.
Dr. Mara Ellison ·
Science11 min read
Succession at Sea: How a Bare Reef Becomes a Forest Again
Ecological succession explains how a bare rocky reef rebuilds into a kelp forest — the pioneer algae, understory kelps, canopy giants, and what restoration can safely skip.
Dr. Mara Ellison ·
Science8 min read
What Grows Back First: Succession on a Cleared Kelp Reef
After a heatwave, storm or harvest clears a kelp forest, the reef rebuilds in a predictable order. The stage-by-stage science of marine succession.
Dr. Mara Ellison ·
Atlas11 min read
The Garden Route: South Africa's Sunny Kelp Coast
From Knysna's estuary to Tsitsikamma's ancient sanctuary, the Garden Route is where warm Agulhas water meets cool kelp country. A Coastal Atlas guide.
Dr. Mara Ellison ·
Encyclopedia9 min read
High Cockscomb: The Crested Prickleback of the Kelp Coast
Meet the high cockscomb, a crested prickleback living under rocks from Alaska to California — an intertidal survivor with a breeding male's comb.
Dr. Mara Ellison ·
Encyclopedia8 min read
Pacific White-Sided Dolphin: The Kelp Coast's Acrobat
Meet the Pacific white-sided dolphin — the torpedo-striped, bow-riding acrobat of North Pacific kelp latitudes, from BC's inshore passages to Monterey Bay.
Dr. Mara Ellison ·
Field Notes7 min read
Field Notes: Counting the Cormorant Roost at First Light
Before the drones fly, Tidewright's monitoring crews count the cormorant roost by hand at dawn. Here's why roost counts still beat satellites for kelp-forest health.
Dr. Mara Ellison ·
Science8 min read
Larval Ecology 101: The Planktonic Childhoods That Build the Reef
Most reef fish and invertebrates begin life adrift as larvae. Learn the feeding strategies, settlement cues and dispersal lotteries that decide who reaches the reef.
Dr. Mara Ellison ·
Science7 min read
The Value of Staying Put: What Long-Term Reef Records Teach Us
Decade-scale reef time series are the unglamorous backbone of kelp science. Here's what continuous monitoring reveals that snapshots never can — and why cuts hurt.
Dr. Mara Ellison ·
Encyclopedia8 min read
Black Tegula Snail (Tegula funebralis): The Grazer of the High Intertidal
Black tegula (Tegula funebralis) rules the high tide line of the Pacific coast — a decades-lived black turban snail whose grazing shapes kelp recruitment.
Dr. Mara Ellison ·
Atlas9 min read
The Derwent Estuary: Kelp Restoration in a City's Front Yard
A guide to Hobart's Derwent Estuary — its kelp and seaweed habitats, a century of industry, urban restoration at Tinderbox, and where to see it yourself.
Dr. Mara Ellison ·
Careers7 min read
How to Become a Fisheries Manager: Quotas, Stock Assessments and Hard Calls
Fisheries managers turn stock science and politics into catch rules that keep both fish and fishers afloat. The path in, the skills, the day-to-day.
Dr. Mara Ellison ·
Atlas7 min read
Mendocino: Life on the Lost Bull Kelp Coast
A field guide to Northern California's bull kelp collapse — the heatwave, the urchin explosion, the closed fisheries, and the difficult road back.
Dr. Mara Ellison ·
Science8 min read
Life Under the Ice: How Sea-Ice Algae Prime the Arctic Food Web
The Arctic's first bloom happens in the dark, inside the sea ice. How sympagic algae prime the polar food web — and why thinning ice changes it all.
Dr. Mara Ellison ·
Encyclopedia9 min read
Northern Elephant Seal: Deep Divers of the Kelp Coast
Northern elephant seals dive farther than almost any mammal and came back from near-extinction. Learn their biology, haul-outs and recovery story.
Dr. Mara Ellison ·
Encyclopedia7 min read
Graceful Crab: The Slender Scuttler of Kelp Country
Graceful crab species profile: the slim Metacarcinus gracilis of eelgrass, bays and kelp edges — how to tell it from a small Dungeness, and its estuary role.
Dr. Mara Ellison ·
Science10 min read
Edge Effects in Kelp Forests: Why Patch Size Changes Everything
A kelp forest's edge is not its boundary but a habitat of its own. How perimeter, patch size and geometry decide survival, diversity and restoration design on temperate reefs.
Dr. Mara Ellison ·
Atlas9 min read
Diving Fortescue Bay: Tasmania's Deep Kelp Gardens
A field guide to diving Fortescue Bay on Tasmania's Tasman Peninsula — kelp gardens, weedy seadragons, sea caves, conditions and what the site says about kelp loss.
Dr. Mara Ellison ·
Atlas9 min read
Norway's Mid-Coast: From Trondheim to the Tangle Kelp Frontier
From Trondheimsfjorden to the skerries of Hitra and Frøya, mid-Norway holds some of Europe's finest tangle kelp forests. A coastal atlas guide.
Dr. Mara Ellison ·
Encyclopedia11 min read
Penpoint Gunnel: The Green Eel-That-Isn't of the Kelp Beds
Meet the penpoint gunnel — an eel-shaped Pacific shore fish that changes colour with its seaweed and guards eggs in a ball under the rocks.
Dr. Mara Ellison ·
Atlas8 min read
Crozet Islands: Subantarctic Kelp Kingdoms of the Indian Ocean
Giant kelp beds ring the Crozet Islands beneath some of the greatest penguin and albatross colonies on Earth — a coastal atlas guide to France's remote subantarctic.
Dr. Mara Ellison ·
Encyclopedia7 min read
Helmet Crab: The Armoured Bristle of the North Pacific
Helmet crab species profile: the saw-edged, bristled Telmessus cheiragonus — a night-roaming burrower of kelp coast sand from Alaska to Japan.
Dr. Mara Ellison ·
Science11 min read
Hyperspectral Eyes on the Ocean: Seeing Kelp in a Hundred Colours
Hyperspectral sensors split light into hundreds of bands, separating kelp species, plankton groups and sediment that multispectral satellites blur together. Here's how.
Dr. Mara Ellison ·
Science9 min read
The Ocean Soundscape: What Reefs Sound Like and Why It Guides Larvae Home
Reefs crackle, croak and rasp — and drifting larvae ride those sounds home. How the ocean soundscape works, and what human noise costs marine life.
Dr. Mara Ellison ·
Encyclopedia11 min read
The Decline and Slow Return of Pycnopodia: A Species Case Study
Sea star wasting disease erased billions of sunflower stars in a few years and reshaped whole kelp coasts. Here is what happened — and why hope is returning.
Dr. Mara Ellison ·
Atlas8 min read
La Jolla Cove and the San Diego Kelp Beds: Canopy Beside the Canyons
A guide to La Jolla's kelp forest, the underwater park that protects it, the leopard sharks of La Jolla Shores, and how to see it all from shore.
Dr. Mara Ellison ·
Careers11 min read
Marine Spatial Planning: The Careers Behind the Maps
Marine spatial planning decides where wind farms, fishers and reserves fit. Inside the GIS, data and facilitation careers that draw the ocean's future map.
Dr. Mara Ellison ·
Atlas9 min read
Gulf St Vincent: Adelaide's Shallow Kelp Sea
A coastal atlas guide to Gulf St Vincent: Adelaide's shallow warm gulf of kelp reefs, giant seagrass meadows, seadragons and a hard-won clean-up.
Dr. Mara Ellison ·
Science11 min read
How Satellites See Kelp: Remote Sensing of Coastal Canopies
From Sentinel-2 pixels to drone orthomosaics, here's how scientists detect, map and track kelp forest canopies from space — and where the limits are.
Dr. Mara Ellison ·
Encyclopedia8 min read
Yellowtail Rockfish: The Nomad School at the Kelp Edge
A species profile of the yellowtail rockfish — the wide-ranging midwater schooler of Pacific rocky reefs, its life history, fishery, and how to tell it from its cousins.
Dr. Mara Ellison ·
Blue Carbon10 min read
Alkalinity Enhancement Near Kelp Forests: Promise and Precautions
Adding alkalinity near kelp forests could store carbon and buffer acidification locally. What the chemistry promises, what ecology warns, and the safeguards that count.
Dr. Mara Ellison ·
Encyclopedia8 min read
Striped Trumpeter (Latris lineata): Tasmania's Reef Icon
The striped trumpeter is Tasmania's celebrated hand-line fish — a kelp-reef juvenile, a deep-reef adult, and a lesson in how long-lived fish repay patience.
Dr. Mara Ellison ·
Careers8 min read
Mapping the Ocean: Careers in Marine GIS and Spatial Data
Marine GIS analysts turn sonar, satellite and survey data into the maps coasts are managed by. Here's what the work involves and how to break in.
Dr. Mara Ellison ·
Encyclopedia8 min read
Western Blue Groper (Achoerodus gouldii): Species Profile
Meet the western blue groper — Western Australia's giant blue wrasse of the kelp reefs, an urchin-eating patriarch that can live more than half a century.
Dr. Mara Ellison ·
Encyclopedia8 min read
Pigeon Guillemot: The Red-Footed Diver of the Kelp Coast
Meet the pigeon guillemot: the black-and-white auk with scarlet feet that nests in shoreline crevices and hunts sculpins through kelp beds.
Dr. Mara Ellison ·
Atlas9 min read
Kelp Forests of the Firth of Clyde: Scotland's Once-and-Future Sea
A coastal atlas guide to the Firth of Clyde: where kelp still grows, what a century of trawling took out, and why Arran's no-take zone matters.
Dr. Mara Ellison ·
Atlas8 min read
Kelp Forests of Newfoundland and Labrador: Cold-Water Kelp and Cod
A guide to Newfoundland's kelp forests — sugar kelp reefs in ice-cold Atlantic water, urchin barrens, the cod collapse's shadow, and what recovery looks like.
Dr. Mara Ellison ·
Atlas11 min read
Kelp Forests of the Catlins: New Zealand's Forgotten Coast
The Catlins is New Zealand's most overlooked kelp coast — bull kelp surf fringes, rare sea lions, yellow-eyed penguins and a Jurassic forest under the tide.
Dr. Mara Ellison ·
Encyclopedia8 min read
Tufted Puffin: The Kelp Coast's Most Photogenic Fisher
Meet the tufted puffin: golden head-plumes, burrow colonies and deep kelp-coast dives. Where to see it, what it eats, and why its southern range is shrinking.
Dr. Mara Ellison ·
Science11 min read
Urchin Barrens: How Reefs Flip, and Why They Stay Flipped
The science of alternate stable states on rocky reefs: how kelp forests collapse into urchin barrens, why barrens resist recovery, and how reefs flip back.
Dr. Mara Ellison ·
Science7 min read
Trophic Cascades: The Idea That Turned Food Chains Upside Down
How a handful of scientists — from Paine's starfish to Estes's sea otters — discovered that predators architect entire ecosystems from the top down.
Dr. Mara Ellison ·
Atlas9 min read
Kelp Forests of Cape Breton: Where the Gulf Meets the Atlantic
A coastal atlas guide to Cape Breton Island's kelp: the Bras d'Or inland sea, the Gulf-facing west coast, the Atlantic headlands, and how to explore them.
Dr. Mara Ellison ·
Encyclopedia9 min read
Golden Kelp (Ecklonia radiata): Species Profile
Golden kelp forms the backbone of Australia's Great Southern Reef. Learn to identify Ecklonia radiata and why this habitat-maker is on the move as oceans warm.
Dr. Mara Ellison ·
Encyclopedia9 min read
Bull Kelp (Nereocystis luetkeana): Species Profile
Meet bull kelp, the fast-growing annual giant of North America's Pacific coast — its biology, Indigenous heritage, dramatic decline and the race to restore it.
Dr. Mara Ellison ·