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Pink crustose algae covers the surface of a rock.
Article

Microbes Help Corals Pick a Home and Settle Down

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A coral head in the Mesoamerican Reef has both bleached and living coral. The white sections are bleached and the brown parts still contain zooxanthellae, the symbiotic algae that provide food to their coral hosts.
Article

Coral Under Pressure: Monitoring Bleaching In Real Time

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Walter Adey and the NMNH coral reef tank
Article

The Evolution of a Reef Aquarium

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J. Murray Roberts studies and maps the cold-water corals known as Lophelia in the North Atlantic.
Article

Exploring the Blue Planet with J. Murray Roberts

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After ocean scientists sort deep-sea coral samples into their different types, they measure and photograph the specimens.
Slideshow

Studying Deep-Sea Corals

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dead coral from disease
Article

Sickness in the Sea: A Coral Plague Hits Florida

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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

Coral Adaptations

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A variety of organisms make their home on this tropical coral reef in Indonesia.
Article

Coral Reefs Need You

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Colorful corals are disappearing in the Great Barrier Reef.
Article

The Great Barrier Reef – Going, Going, Gone???

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A coral has just spawned. Each of the hundreds of polyps releases a small pink bundle of sperm and eggs.
Article

A Tale of Sex and Stress in the Ocean

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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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