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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.
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Valentinni's Sharpnose Puffer

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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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A school of Hawaiian squirrelfish.
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A School of Hawaiian Squirrelfish

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Two coral trout swim on a reef in Fiji.
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Coral Trout in a Fiji Reef

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

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A Pontoh pygmy seahorse
Slideshow

10 Things You Never Knew About Seahorses

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Two nurse sharks hover over a baited cage
Lesson Plan

Fish Feeding

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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.
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Scientists Catalog Life on the Island of Moorea

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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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Researchers adopted the “yabbie pump,” the long silver tool shown here, from Australian fishing gear.
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Collecting Shallow-Water Specimens with the "Yabbie Pump"

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A blue parrotfish hides among coral.
Article

Tough Teeth and Parrotfish Poop

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