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What is coral? The answer is coral is an animal. This cutaway diagram of a coral polyp shows the location of its photosynthetic algae, or zooxanthellae, which coral needs to survive.
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What Is Coral? A Coral Polyp and Zooxanthellae

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A puffin sits on a rock next to a puffin decoy.
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Puffin and Decoy

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This painting of swarthy buccaneers in the midst of a fierce battle was painted by the prolific American marine painter Frederick J. Waugh, and won the Thomas B. Clarke award in 1910 for the best American figure composition.
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The Buccaneers painting

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a white coral on the seafloor
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An Ocean Heat Wave Reaches to the Seafloor

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This species of bamboo coral, discovered in 2004 in the Pacific Northwest, has unusually long and impressive tentacles.
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Newly Discovered Deep-Sea Corals

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Alvin, a human occupied vehicle (HOV), returns to the ship after a dive.
Slideshow

Exploring the Ocean with Robots and Submarines

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This queen parrotfish scrapes algae from Caribbean reefs with its parrot-like beak.
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From Despair to Repair: Protecting Parrotfish Can Help Bring Back Caribbean Coral Reefs

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Rough periwinkles sit on a bed of barnacles.
Article

Spirals in Time: A Walk at the Seashore

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Nancy Rabalais smiling at the camera in a headshot.
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Five Questions with Nancy Rabalais, Tracking Dead Zones In the Gulf

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The Havre volcano lies three thousand feet (900 meters) beneath the sea surface.
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The Mystery of an Underwater Volcano

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A blue parrotfish hides among coral.
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Tough Teeth and Parrotfish Poop

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