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Many species of pink coralline algae, which cements coral reefs together, cover a reef surface in the Southern Line Islands.
Article

Coralline Algae: The Unsung Architects of Coral Reefs

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Tiny organisms found on ARMS
Article

Traveling Around the World to Study the Future of the Ocean

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: Black corals often resemble bushes or trees. Their living tissue can be one of several colors. It’s the skeleton that is black.
Article

Black Corals of the Deep

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Photograph of a bristly brown and white worm, with one end pressed against a pale green coral.
Photo

Fireworm Takes on Fire Coral

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This purple urchin Paleopneustes cristatus is seldom seen by itself, and can be found in groups of hundreds.
Photo

Purple Sea Urchin

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A blue parrotfish hides among coral.
Article

Tough Teeth and Parrotfish Poop

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The weedy sea dragon male can hold around 250 eggs in his pouch.
Photo

The Dragon of the Sea

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The Tubbataha Reefs National Park site in the Philippines was inscribed on the World Heritage List in 1993. The site is an example of a pristine coral reef with a spectacular 100 m (330 ft) perpendicular wall, extensive lagoons, and two coral islands - all
Photo

Tubbataha Reefs Natural Park, Philippines

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

Surgeonfish: Indicators of a Healthy Reef

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Two nurse sharks hover over a baited cage
Lesson Plan

A Tale of Deep Corals

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Two nurse sharks hover over a baited cage
Lesson Plan

Caution! Do Not Bleach

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a man snorkels above a reef while a woman in flippers sits on a boat
Timeline

Sunscreen in the Environment

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