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stony corals among sea fans
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A Healthy Reef

 A healthy coral reef with both hard corals and softer-bodied relatives at...
a sea fan grows over dead coral
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Waving Sea Fans

 Sea fans—softer-bodied coral relatives—colonizing a dead stony coral framework. ...
a highly bleached coral reef
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Bleached

 A highly bleached coral reef in the Pacific Ocean. ...
coral polyps
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Healthy Coral Polyps

 Healthy coral is colorful. The entire coral is actually a colony of many little...
dead coral from disease
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Diseased Coral Polyps

 The Florida Keys were hit by a mysterious disease in 2014. Here, a colony of...