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Marine life
Species profiles and field notes.
Species profiles and field notes.
Hammerhead Sharks: The Schooling Phenomenon
Scalloped hammerheads gather in schools of hundreds at a handful of remote seamounts worldwide. This is where to find them and what drives this extraordinary ag...
Shark Finning: Understanding the Crisis
Shark finning has reduced global shark populations by 71% since 1970. This is what's driving it, what the ecological consequences are, and where the law and the...
Sea turtles: the reef regulars
Green, hawksbill, loggerhead, leatherback. How to tell them apart underwater and where each species is most common.
Anemonefish and Clownfish: Symbiosis in Action
The relationship between anemonefish and their host anemone is one of biology's most elegant mutualisms. The real story is stranger than the films suggest.
Reef sharks: the ones you'll actually see
Grey reef, whitetip, blacktip, Caribbean reef. The four reef sharks divers encounter most and where to find them.
Seahorses: the hardest find in macro diving
Pygmy seahorses are the size of a grain of rice. Finding one without a guide is nearly impossible — which is exactly why the effort matters.
Hammerhead sharks: the offshore schooling mystery
Why do scalloped hammerheads school at specific seamounts and specific times? Nobody really knows, but divers can still witness it.
Whale sharks: the gentle giant
The largest fish in the ocean feeds on the smallest. Where and when to dive with whale sharks, and how to behave when you find one.
Coral Bleaching: The Climate Crisis Underwater
Mass bleaching events are becoming annual events on reefs that used to recover between them. Here is what bleaching is, why it matters, and what the trajectory...
Understanding Coral Bleaching: What Divers Need to Know
Coral bleaching is increasing in frequency and severity. This is what it is, why it happens, and what divers can do about it.
Triggerfish: Intelligent and Territorial
Triggerfish lock themselves into crevices with a spine mechanism, guard nest sites aggressively, and are considered among the most intelligent reef fish. They a...
Manta rays: cleaning stations and feeding frenzies
Reef mantas versus oceanic mantas, and how cleaning stations let divers predict where they'll be on any given morning.
Mola mola: the sunfish of Nusa Penida
The ocean sunfish is the heaviest bony fish in the world and it behaves nothing like you'd expect a fish to behave.
The Sardine Run: South Africa's Greatest Underwater Spectacle
Every June, billions of sardines migrate up the KwaZulu-Natal coast, triggering a feeding frenzy of sharks, dolphins, gannets, and whales that is one of the gre...
Nudibranchs: The Rainbow of the Reef
More than 3,000 species, colours that seem impossible for biology to produce, and a biology stranger than any other reef animal. Nudibranchs are the gateway dru...
The State of Coral Reefs: 2026 Report
Coral reefs have experienced multiple mass bleaching events since 2016. What the science shows about the current state of the world's reefs — and what the reali...
Manta Rays: Acrobats of the Reef
Manta rays are the largest rays in the ocean — and among the most intelligent fish. Barrel rolls, cleaning stations, and feeding frenzies: where to find them an...
Nudibranchs: the macro obsession
Why experienced divers end up staring at tiny sea slugs. A primer on the slow, strange world of macro diving.