Dragos Dumitrescu's thorny seahorse photo won honorable mention in this year's Through the Lens Photo Competition. Find out how he got this unique shot.

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Looking for an out-of-the-ordinary shark dive? Here are five you probably haven't heard about but should — plus 15 favorites we just can't get enough of.

After years of searching, divers discover the remains of three long-lost wrecks and reveal more details about their mysteries.

Beautiful but deadly, this tiny critter is a close cousin of the blue-ringed octopus. Learn how pro photographer Jeffrey Chua de Guzman got the shot.

Philippines

Check out the latest video from GoPro, where two divers save an entangled manta ray in the Philippines!

Watch diver James and the rest of his team as they set on a sailing and diving adventure in the South China Sea.

The nocturnal reticulate stargazer buries itself in the sand, with only its face protruding, waiting for unsuspecting prey to swim overhead.