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Pink crustose algae covers the surface of a rock.
Photo

Encrusting Pink Algae and a Seastar

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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 graph compares the crustacean biodiversity of coral reefs around the world.
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Coral Reef Biodiversity: A Comparison

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A graph compares the crustacean biodiversity of coral reefs around the world.
Article

Hotspot of Biodiversity

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Where the pH is the lowest, corals can no longer grow - sand, rubble and seagrasses replace the reef.
Article

Sneak Peek: Future of Coral Reefs in an Acidifying Ocean

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

A Plague of Sea Stars

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Auster gets ready to study fish predators at Gray’s Reef National Marine Sanctuary off the coast of Georgia.
Article

Peter Auster: The Gee Whiz Factor

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A whale shark swims with a diver off the coast of East Africa.
Article

The Big Five of the Ocean: Exploring the Waters of East Africa

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A bluefin trevally swims in Hawaii’s Maro Coral Reef, part of the Papahānaumokuākea Marine National Monument.
Slideshow

Two Views of Coral Reefs: Thriving and Threatened

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Two nurse sharks hover over a baited cage
Lesson Plan

Food Chain Hide and Seek

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Black coral, primnoid coral, and feather stars flourish deep on the pristine Davidson Seamount.
Article

Amy Baco-Taylor: Passionate about Deep-Sea Corals

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Two nurse sharks hover over a baited cage
Lesson Plan

Focus on Farmer Fish

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