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dead coral from disease
Article

Sickness in the Sea: A Coral Plague Hits Florida

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a highly bleached coral reef
Photo

Bleached

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scuba divers swim over bleached stag corals
Photo

White Corals in a Bleached Reef

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Corals, sponges, and algae are the major components of most coral reef communities as shown in this picture.
Overview

Corals and Coral Reefs

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Swimmers brave the waters in the shadow of a coal-fired power plant. Coal plants like this one emit CO2 into our atmosphere which is warming the planet and altering the chemistry of the ocean.
Overview

Climate Change

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Close-up photograph of translucent coral polyps, showing the symbiotic algae living inside.
Slideshow

Zooxanthellae and Coral Bleaching

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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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a man speaking at the podium
Video

World Oceans Day 2012 - Live Webcast

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A photo of coral visibly affected by disease.
Photo

Diseased Coral

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In this photo of a shallow coral reef in the Pacific there are three species of forams. Their colors come from the symbiotic algae that live inside the foram shells.
Photo

Shallow Coral Reef Foraminifers

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Two nurse sharks hover over a baited cage
Lesson Plan

In Hot Water

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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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