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Two nurse sharks hover over a baited cage
Lesson Plan

Treasures in Jeopardy

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Red coral necklaces in a display window. Harvesting deep-sea coral to produce jewelry like this threatens these ecosystems.
Photo

Coral for Sale

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Algae has overtaken this coral reef off heavily populated Kiritimati, or Christmas Island.
Photo

Unhealthy Coral Reef, Kiritimi, Line Islands

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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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Colorful corals are disappearing in the Great Barrier Reef.
Photo

Coral at the Great Barrier Reef

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Two nurse sharks hover over a baited cage
Lesson Plan

Caution! Do Not Bleach

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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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