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Colorful corals are disappearing in the Great Barrier Reef.
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Coral at the Great Barrier Reef

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These bleached corals in the Gulf of Mexico are the result of increased water temperatures.
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Bleached Corals

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Two nurse sharks hover over a baited cage
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Food Chain Hide and Seek

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A diver on the reef near Moorea collects samples.
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Research Diver in Moorea

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An unidentified moray eel held in researcher's hands.
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A Baby Moray Eel, or a Really Small Adult?

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A couple inches wide and up to ten feet long, the bobbit worm stays hidden under tropical sands with just its five antennae poking out—waiting for prey to swim by.
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The Bobbit Worm

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Pink crustose algae covers the surface of a rock.
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Encrusting Pink Algae and a Seastar

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An underwater photo of coral recovering from a bleaching event.
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Resilient Coral

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Coral scientist Dr. Amy Baco-Taylor observed corals like these on her first submarine dive to a deep-sea coral bed off the coast of Hawaii.
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Deep-Sea Coral Community

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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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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
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Tubbataha Reefs Natural Park, Philippines

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Blue-spotted stingrays use the help of cleaner fish to stay clean and healthy.
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Blue-spotted Stingray

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