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A marine biologist's guide to diving with octopuses: how they camouflage, how to find a den by its midden, the species divers see from the Caribbean to Puget Sound, what...
A marine biologist's guide to nudibranchs: what they are, how to tell dorids from aeolids, why they wear such bold colors, where to see them from Anilao to California, and...
A marine biologist's field guide to telling the seven sea turtle species apart underwater — costal scutes, prefrontal scales, and beak shape — plus what the 2025 IUCN Red List...
A marine biologist's guide to manta rays for divers: how to tell reef and oceanic mantas apart, why cleaning stations matter and how not to wreck one, the best destinations...
A marine biologist's guide to whale shark encounters: where and when aggregations form, why most encounters are snorkeling rather than scuba, the approach-distance rules host countries enforce, how to vet...
What the shark-bite data actually shows, which species divers realistically encounter, how to read a shark threat display, and how to turn your sightings into usable conservation data.
The species most likely to injure a recreational diver, how to recognize them underwater, what current first aid guidance actually says, and the exposure protection that keeps accidental contact from...
Coral reefs cover less than one percent of the ocean floor, yet roughly 25 percent of all marine species spend part of their lives in, on, or around them, according...
The same sunscreen that protects your skin can harm coral reefs. A marine biologist's guide to reef-safe sunscreen for divers: which ingredients damage coral, what mineral filters to choose, where...
California's kelp forests rank among the most biodiverse underwater environments on Earth. This guide covers the marine life you'll encounter, the best dive sites along the coast, what to expect...
