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A couple inches wide and up to ten feet long, the bobbit worm stays hidden under tropical sands with just its five antennae poking out—waiting for prey to swim by.

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The Bobbit Worm

October 2015

A coral catshark

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Coral Catshark

August 2014

Whitemouth morays hide in the crevices of Indo-Pacific coral reefs with only their heads (and white mouths) emerging, mouths agape, to breathe and hunt crustaceans and fish.

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Eel, Embedded

June 2015

A zoomed-in image of the crown-of-thorns sea star.

Article

A Plague of Sea Stars

May 2011

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Blue-spotted stingrays use the help of cleaner fish to stay clean and healthy.

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Blue-spotted Stingray

August 2013

In some reefs, small fishes such as this broad-barred goby protect corals by eating invading seaweeds.

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Coral Goby Cleans Coral

November 2012