Explore9 min read
Freediving Safety Basics: The Buddy Rules That Save Lives
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 ·
The Tidewright Journal
Everything we know about growing back the ocean.
Encyclopedia entries, coastal atlas guides, science explainers, farming know-how and recipes — written by Tidewright’s scientists, engineers, chefs and field crews, and open to everyone.
Explore9 min read
Freediving Safety Fundamentals: Buddy Supervision and Blackout Rescue
Blackouts arrive without warning and the buddy is the rescue. Active supervision, blackout response and incident recovery for freedivers, step by step.
Tom Okafor ·
Kitchen11 min read
Freezing, Drying and Fermenting: A Home Preserver's Guide to Seaweed
How to preserve fresh seaweed at home: blanching and freezing kelp, drying without a dehydrator, quick ferments, storage times and texture expectations.
Sofia Andersson ·
Kitchen7 min read
Preparing Fresh Kelp: From Slippery Blade to Dinner-Ready
Fresh kelp is easier than it looks. How to clean, blanch, cut and store fresh kelp — plus the trick that turns it emerald green and tender.
Sofia Andersson ·
Encyclopedia7 min read
Frilled Dogwinkle (Nucella lamellosa): The Whelk That Changes Shape for Its Enemies
The frilled dogwinkle drills barnacles on rocky shores and famously thickens its shell when crabs patrol — a textbook case of predator-induced defence.
Dr. Theo Nakamura ·
Kitchen9 min read
Furikake from Scratch: The Nori-and-Sesame Rice Seasoning You Can Stop Buying
Decode the furikake label, master the nori-sesame formula in grams and percentages, and judge any shop blend — three variations included.
Sofia Andersson ·
Atlas8 min read
The Galápagos Kelp: A Forest Rediscovered at the Equator
Eisenia galapagensis, the Galápagos' only kelp, vanished after the 1982–83 El Niño and was feared extinct — until deep divers found it alive in 2018.
Dr. Theo Nakamura ·
Farming9 min read
Inside the Gametophyte Culture Room: Light, Temperature and Timing
The gametophyte culture room is the quietest, most critical room in a kelp hatchery. How light banks, temperature regimes and sterile timing turn spores into seed.
Naomi Reyes ·
Encyclopedia9 min read
Gelidium (Agar Weed): The Little Red That Gels the World's Kitchens and Labs
Gelidium, the agar weed: how to recognise this small red seaweed, where it grows, and why its gels run from dessert moulds to microbiology labs.
Dr. Theo Nakamura ·
Explore9 min read
Getting Scuba Certified: What the Course Actually Teaches (and What It Doesn't)
A clear-eyed guide to open-water scuba certification: what agencies really differ on, course structure and cost, referral options, and bridging from the pool to kelp.
Tom Okafor ·
Encyclopedia7 min read
Giant Kelpfish (Heterostichus rostratus): The Shape-Shifting Kelp Mimic
The giant kelpfish changes colour to vanish among kelp blades. Identification, camouflage, behaviour and life cycle of this Southern California clinid.
Dr. Theo Nakamura ·
Encyclopedia8 min read
Giant Keyhole Limpet: The Mantle-Cloaked Gardener
Megathura crenulata, the giant keyhole limpet, cloaks its shell in a living mantle and bleeds blue blood prized by medicine. Identification, diet and reef role.
Dr. Theo Nakamura ·
Encyclopedia9 min read
Giant Red Sea Cucumber: The Forest Floor's Vacuum Cleaner
Apostichopus californicus, the biggest sea cucumber on the Pacific coast, recycles kelp forest sediment from Alaska to California. Biology, defences, fishery.
Dr. Theo Nakamura ·
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 ·
Atlas9 min read
Glacier Bay, Alaska: New Kelp Forests on the Front Lines of Retreating Ice
Two centuries of retreating ice opened fjords that kelp, otters and whales are still colonising — a guide to Glacier Bay's young, fast-changing underwater forests.
Dr. Lena Fischer ·
Encyclopedia8 min read
Goldsinny Wrasse (Ctenolabrus rupestris): The Atlantic Kelp Bed's Small Cleaner
The goldsinny wrasse is the most abundant small wrasse on Europe's kelp coasts — a parasite cleaner, nest guard and aquaculture conscript. Full species profile.
Dr. Theo Nakamura ·
Kitchen8 min read
Gomashio: Sesame-Salt the Japanese Way, and How Toast Changes Everything
Gomashio is Japan's two-ingredient sesame salt, transformed entirely by careful toasting. Ratios, technique, three modern seaweed variations, and storage.
Sofia Andersson ·
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 ·
Encyclopedia7 min read
Gopher Rockfish (Sebastes carnatus): Species Profile
The gopher rockfish is a mottled, hole-dwelling resident of California's shallow kelp reefs — sedentary, long-lived and beloved of reef divers.
Dr. Theo Nakamura ·
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 ·
Farming10 min read
Gracilaria and Shrimp: A Polyculture That Cleans While It Grows
How pairing Gracilaria with farmed shrimp turns waste nutrients into a second crop — pond designs, nutrient budgets, husbandry and the honest economics of the pairing.
Naomi Reyes ·
Farming9 min read
Grading Dried Kelp: Colour, Texture and the Screens That Matter
Dried kelp sells on appearance, snap and cleanliness long before lab results. How food-market grading works — the grades, the defects and the prices they command.
Naomi Reyes ·
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 ·