124 articles
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 ·
The banded morwong is a slow-growing, site-loyal grazer of Tasmania's kelp reefs — a fish that can live for generations and taught fisheries a hard lesson.
Dr. Theo Nakamura ·
How a boardwalk village at the end of a gravel road became Canada's marine-science capital, and how to visit the kelp fjord it has studied for fifty years.
Tom Okafor ·
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 ·
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 ·
Black rockfish: the dark, schooling Sebastes of northeast Pacific kelp edges — identification vs blue rockfish, life history, fishery and conservation.
Dr. Mara Ellison ·
Panulirus interruptus is the clawless, night-hunting lobster of California kelp reefs — an urchin predator, a famous fishery, and a quiet guardian of the forest.
Dr. Theo Nakamura ·
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 ·
Lessonia trabeculata, the huiro, builds Chile's great subtidal kelp forests and feeds a global alginate industry. Biology, fishery, ecology and El Niño risk.
Dr. Theo Nakamura ·
Fjords, surf beaches and kelp forests in one of Canada's most storied sounds — marine life, Nuu-chah-nulth stewardship and a famous conservation history.
Jack Callum ·
Cold-water snorkelling rewards the prepared. How to choose wetsuit thickness, hoods, gloves, boots, masks, snorkels and fins for water below 18 °C.
Tom Okafor ·
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 ·
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 ·
Cornwall's kelp forests shelter jewel anemones, seals and centuries of Celtic sea history. A regional guide to the coast's reefs and wildlife.
Tom Okafor ·
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 ·
At the Cape of Good Hope, cold Atlantic upwelling and False Bay warmth build towering kelp. A practical dive guide to Cape Point's sites, seasons and permits.
Tom Okafor ·
A practical guide to your first drysuit dives: how buoyancy really differs from a wetsuit, the inversion trap, squeeze, cuff dumps and the training to do before kelp diving.
Tom Okafor ·
Milford, Doubtful and Dusky: a guide to Fiordland's drowned glacial fjords, where a dark freshwater lid hides kelp forests and shallow-growing black coral.
Dr. Lena Fischer ·
Freediving is beautiful and quietly unforgiving. The core safety rules — one up, one down, never hyperventilate, know blackout — with the science behind each.
Tom Okafor ·
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 ·
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 ·
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 ·
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 ·
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 ·
A good dive log is more than a souvenir — it's a field notebook. Here's what to record, how to keep it consistent, and how your dives become usable data.
Tom Okafor ·
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 ·
A stop-by-stop Highway 1 itinerary built around kelp forests — headlands, coves and viewing points from the redwood coast to Point Lobos, with seasons and etiquette.
Tom Okafor ·
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 ·
Kelp beds concentrate seabirds like nowhere else on the coast. Where to stand, what to bring, and how to identify the divers, dabblers and pirates of the kelp line.
Tom Okafor ·
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 ·
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 ·
Brittany's laminaria beds are Europe's great kelp forests. Where they lie around Molène, Sein and Ouessant, what lives in them, and how to dive the tide races.
Tom Okafor ·
Oregon's bull kelp rides one of the wildest upwelling coasts on Earth — and its southern forests are on the edge. A guide to the reefs and the fight back.
Dr. Theo Nakamura ·
The kelp gull is the default large gull of the southern oceans — an adaptable black-backed coastal bird from Cape Town to the Antarctic Peninsula. Full profile.
Tom Okafor ·
Kelp isopods graze fouling algae off giant kelp blades — and in boom years can chew through the stipes themselves. Meet the forest's smallest crew.
Dr. Theo Nakamura ·
Kelp spores rarely travel far, while fish and invertebrate larvae ride currents for weeks. How dispersal distance shapes reef recovery and restoration design.
Dr. Elias Brandt ·
The leather star (Dermasterias imbricata) is a smooth, slippery, garlic-scented sea star that hunts anemones and sea cucumbers — biology, range and how to find it.
Dr. Theo Nakamura ·
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 ·
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 ·
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 ·
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 ·
Meet the giant pink sea star — a two-foot, sand-plowing predator of clams and sand dollars that patrols the soft floors between Pacific kelp forests.
Dr. Theo Nakamura ·
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 ·
Red Irish lords are mottled, spiny, glued-to-the-rock sculpins that vanish against red algae and barnacles — a masterclass in benthic camouflage.
Dr. Theo Nakamura ·
Rubberlip seaperch (Rhacochilus toxotes) species profile: the largest surfperch, with fleshy lips for picking invertebrates off rocks at the kelp forest edge.
Dr. Theo Nakamura ·
Sargassum horneri arrived in California in the 2000s and spread fast. Profile of the invasive 'devil weed', its ecology, impacts and control.
Dr. Theo Nakamura ·
Sea bamboo is the towering hollow-stemmed kelp of South Africa's cold west coast. Biology, range, ecology and harvest of Ecklonia maxima, the Cape's forest builder.
Dr. Theo Nakamura ·
Between the kelp blades and the open ocean runs an invisible microbial economy: exudates out, nutrients back, viruses policing it all. A field guide.
Dr. Theo Nakamura ·
Senja and Norway's Barents coast grow clear-water Arctic kelp patrolled by orcas. A regional guide to the kelp, cod and whales of the high north.
Tom Okafor ·
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 ·
A field guide to choosing kelp shore-dive sites — what habitat makes kelp grow, four site archetypes and how to dive each, and what the canopy itself tells you.
Tom Okafor ·
The bluntnose sixgill shark is a primitive deep-water giant that rises along kelp-lined fjords and sounds at night — six gills, green eyes, worldwide.
Tom Okafor ·
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 ·
Southern bull kelp (Durvillaea) grips the roughest surf coasts on Earth with the strongest holdfast of any kelp. Honeycomb blades, Māori pōhā, ocean rafting.
Dr. Theo Nakamura ·
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 ·
Spearfishing can be the most selective way to take seafood — or a fast way to damage a kelp forest. Here's how to do it legally, selectively and with respect.
Tom Okafor ·
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 ·
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 ·
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 ·
Meet the striped seaperch, a live-bearing surfperch of Pacific kelp beds — and a close look at how viviparity works in a fish that births on the reef.
Dr. Theo Nakamura ·
Turf-forming algae are the low, weedy mats that move in when kelp forests fall — and can hold a reef in place. A group profile of the kelp forest's most stubborn rival.
Dr. Theo Nakamura ·
Kelp forests make navigation both easier (vertical landmarks) and harder (featureless canopy walls). Learn compass discipline plus natural navigation by light and surge.
Tom Okafor ·
A pencil, a slate and a slow drift through the canopy: how underwater sketching turns an ordinary kelp dive into serious observation practice.
Tom Okafor ·
Kelp forests eat daylight. How to choose a primary torch and backup light for kelp diving, read lumens honestly, and use light without harassing wildlife.
Tom Okafor ·
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 ·
Taputeranga Marine Reserve, the Island Bay snorkel trail, orcas in the strait: a guide to Wellington's kelp-fringed south coast, ten minutes from the CBD.
Tom Okafor ·
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 ·
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 ·
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 ·
A beginner-intermediate guide to wreck diving on temperate kelp coasts: how sunken ships become living reefs, penetration hazards, buoyancy skills and famous wrecks.
Tom Okafor ·
Brittany grows the biggest kelp beds in Europe and built an industry on goémon. A guide to the Iroise Sea's Laminaria forests, the harvest and its future.
Dr. Theo Nakamura ·
Northern Spain's Cantabrian coast holds kelp at the shrinking warm edge of its European range — the continent's best-documented climate front line underwater.
Dr. Lena Fischer ·
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 ·
Both make headlines as warm water, but El Niño and marine heatwaves are different beasts. How they differ, how they interact, and what each does to kelp.
Dr. Lena Fischer ·
Inside the Falkland Islands' giant kelp beds — among the most extensive on Earth — and the penguins, seals and steamer ducks that run on them.
Dr. Lena Fischer ·
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 ·
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 ·
Kelp forests hiss, rasp and hum. Meet the shrimp, urchins and fish behind the noise — and the hydrophones turning the din into reef science.
Tom Okafor ·
Acid kelp (Desmarestia) stores battery-strength acid inside its own cells — the strangest chemical defence in the kelp forest.
Dr. Theo Nakamura ·
Clown dorid (Triopha catalinae) species profile: identifying the polka-dotted nudibranch, its bryozoan diet, rhinophores and where to find it on kelp reefs.
Dr. Theo Nakamura ·
Meet the eastern blue groper, the friendly, urchin-crunching giant wrasse of New South Wales reefs — every adult blue male began life as a female.
Dr. Theo Nakamura ·
West of Brittany, the Iroise Sea holds Europe's biggest kelp beds under some of its fiercest tides — inside a marine park the working coast helped build.
Dr. Theo Nakamura ·
Evasterias troschelii, the mottled or false ochre star — the soft-bodied, deep-dwelling predator that picks off limpets, whelks and baby sea stars.
Dr. Theo Nakamura ·
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 ·
Inside the subantarctic kelp forests of the Strait of Magellan and Tierra del Fuego: cold clear water, drifting kelp highways, and science at the southern frontier.
Dr. Elias Brandt ·
Nine volcanic islands mid-ocean grow deep gardens of golden Laminaria ochroleuca kelp. A guide to the Azores' forests, crossroads fauna and diving.
Tom Okafor ·
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 ·
San Carlos Beach is California's easiest first kelp dive. A practical planner: when to go, where to gear up, and a step-by-step circuit under the canopy.
Tom Okafor ·
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 ·
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 ·
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 ·
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 ·
Guide to the Cape Peninsula's kelp forests: two oceans, sea bamboo, seals and sharks, freediving culture, and how a warming world is shifting the reefs.
Tom Okafor ·
Urticina crassicornis, the painted or Christmas anemone of North Pacific kelp reefs: identification, diet, reproduction and its place in the cold-water forest.
Dr. Theo Nakamura ·
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 ·
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 ·
Portrait of the Port Jackson shark: Australia's gentle, crested egg-layer that crunches sea urchins and returns to the same reef year after year.
Dr. Theo Nakamura ·
Paguristes ulreyi, the furry hermit crab of Pacific kelp forests: how to identify it, why it wears hydroid-covered shells, and its role on the reef floor.
Dr. Theo Nakamura ·
Meet the giant Pacific octopus: the world's largest octopus, a kelp-forest den-dweller with three hearts, blue blood and one shot at motherhood.
Dr. Theo Nakamura ·
Scotland's Moray Firth is famous for its resident bottlenose dolphins, but its quiet kelp fringes, salmon rivers and tide races reward a closer look. A coastal atlas guide.
Jack Callum ·
A snorkeller's guide to Simon's Town and False Bay — Windmill Beach, Boulders, kelp-fringe marine life, shark-smart safety, seasons and gear for Cape Town's east side.
Tom Okafor ·
Meet the ochre sea star, the purple tidepool predator whose removal in a famous 1960s experiment coined the keystone species concept.
Dr. Theo Nakamura ·
Porichthys notatus hums for hours to woo mates, glows with borrowed light and survives hours out of water. Meet the kelp coast's oddest neighbour.
Dr. Theo Nakamura ·
St Helena Bay is where the Benguela upwelling cell is born — kelp fringe, rock lobster, seabird islands, and the dynamics of a bay that feeds an entire region.
Dr. Lena Fischer ·
Orkney and Shetland hold Britain's most exposed kelp forests: tide-scoured channels, otter-rich shores and the sunken fleet of Scapa Flow. A coastal atlas guide.
Jack Callum ·
The sailfin sculpin is a banded-eye, flag-finned reef fish of the North Pacific — famous for the courtship wave of its tall sail-like first dorsal fin.
Dr. Theo Nakamura ·
Boat charters reach wilder kelp with less sweat; shore diving is cheap, free and trains you faster. How to choose for your skill, budget and coastline.
Tom Okafor ·
Moving from stills or action cams to serious underwater video — housings, video lights, white balance and the shot discipline that makes kelp footage worth editing.
Tom Okafor ·
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 ·
The mosshead warbonnet is a moss-fringed, eel-like prickleback of North Pacific reefs — a shy, hole-loving specialist of kelp-bed cracks and crevices.
Dr. Theo Nakamura ·
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 ·
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 ·
The scalyhead sculpin is a tassel-headed, fully scaled cottid of Pacific kelp beds — a small ambush hunter whose males turn crimson over guarded egg masses.
Dr. Theo Nakamura ·
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 ·
The brown Irish lord is a spiny, red-bellied sculpin of North Pacific reefs — a camouflaged ambush hunter of crabs and shrimps from Alaska to California.
Dr. Theo Nakamura ·
Meet the kelp greenling, a shy Pacific reef fish of extraordinary colours — and learn why males turn midnight-dark to guard their egg clutches for weeks.
Dr. Theo Nakamura ·
How to snorkel with seals and sea lions on kelp coasts legally and kindly — reading haul-outs, letting them choose the encounter, and what to do when a pup swims to you.
Tom Okafor ·
Brooding anemone species profile: protandric hermaphrodite, live-bearing parent, epiphyte of kelp and eelgrass — and a dispersal puzzle solved by rafting.
Dr. Theo Nakamura ·
Everything you need to dive Casino Point Dive Park on Catalina Island — entry steps, kelp forest routes, garibaldi and giant sea bass, conditions, and getting there.
Tom Okafor ·
Plan a day paddle along kelp coastlines — choosing routes, timing tides and currents, reading the canopy from seat level, and staying safe on exposed water.
Tom Okafor ·
Meet the California scorpionfish — a venomous, camouflaged ambush predator of southern kelp reefs. How to identify it, where it hides, and why its sting deserves respect.
Dr. Theo Nakamura ·
How to shoot smooth, colourful underwater video in a kelp forest with an action camera — the settings, lights, mounts and slow moves that separate footage from mush.
Tom Okafor ·
Meet the Pacific angelshark, the sand-buried ambusher of California's kelp edges: how it hunts, how it nearly vanished, and how it came back.
Dr. Theo Nakamura ·
How to get genuinely good kelp-forest footage from an action camera — the settings, mounts, lights and habits that separate keepers from mush.
Tom Okafor ·