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A squat lobster and blackbelly rosefish find shelter on a Lophelia pertusa coral reef off the southeastern United States.
Photo

Coral Reef Lobster and Fish

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Two nurse sharks hover over a baited cage
Lesson Plan

Fish Feeding

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A school of Hawaiian squirrelfish.
Photo

A School of Hawaiian Squirrelfish

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Two coral trout swim on a reef in Fiji.
Photo

Coral Trout in a Fiji Reef

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Valentinni's sharpnose puffer lives on Indo-Pacific coral reefs, where it shoals in groups of 10-100 puffers and feeds on algae and tunicates.
Photo

Valentinni's Sharpnose Puffer

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In the X-ray image of this Viper Moray Eel (Enchelynassa canina), note the second set of jaws in the “throat”; these are the gill arches, which are present in all fish.
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X-Ray Image of a Viper Moray Eel

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Colorful fishes throng a reef in the Northwestern Hawaiian Islands.
Slideshow

Bizarre and Beautiful Coral Reef Animals

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Convict surgeonfish are the roaming sheep of the reef but, instead of noshing on grass, they feed on algae.
Article

Helpful Herbivores

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Fish swim underwater amidst mangrove roots at Bocas del Toro, Panama.
Article

On the Trail of DNA in the Ocean

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Grey reef sharks are among the most versatile and tough predators on a Pacific coral reef, but they are also among the most vulnerable species, as they are threatened by wasteful fishing practices like shark finning.
Article

Where the Shark and the Snapper Roam

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On Moorea, an island in French Polynesia, researchers are striving to complete a biocode—a DNA catalog of every life form big enough to pick up with tweezers.
Overview

Scientists Catalog Life on the Island of Moorea

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A Pontoh pygmy seahorse
Slideshow

10 Things You Never Knew About Seahorses

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