Fish-ID tips from Ned and Anna DeLoach, who offer fish-ID memory aids for scuba divers.

Ned and Anna DeLoach are rock stars, with ­legions of fans who track them like groupies. Each year the beloved naturalists induct divers into the wonders of fish-ID surveys — and the importance of citizen science — during Marine Life Education weeks at Bonaire’s Buddy Dive Resort.

Sharpen your coral identification skills with these tips on how to ID smooth flower coral.

Does flash photography harm small ocean creatures? Pygmy seahorse expert Dr. Richard Smith offers guidelines for photographing these fragile creatures.

What it takes to create *Blue Planet II*, from the perspective of one of the film's videographers.

Learn about the diet of hawksbill sea turtles, green sea turtles and loggerhead sea turtles so you can answer the question, what do sea turtles eat?

The most interesting facts about parrotfish, including their diet, size and production of sand.

What it's like to witness a giant manta while hanging in the open ocean for decompression obligations.

Sharpen your coral identification skills with these tips on how to ID grooved brain coral.