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These corals are dead—smothered in sediments and overgrown with algae.
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Dead Coral Overgrown with Algae

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Researchers adopted the “yabbie pump,” the long silver tool shown here, from Australian fishing gear.
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Collecting Shallow-Water Specimens with the "Yabbie Pump"

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A bluefin trevally swims in Hawaii’s Maro Coral Reef, part of the Papahānaumokuākea Marine National Monument.
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Hawaii’s Maro Coral Reef

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A piece of the Hyperbolic Crochet Coral Reef exhibit.
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A Rainbow of Crocheted Corals

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Colorful corals and brittlestars on Manning Seamount off the New England coast.
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Manning Seamount Deep Coral Communities

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

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Two nurse sharks hover over a baited cage
Lesson Plan

Keeping Watch on Coral Reefs

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A purple hard coral releases bundles of pink eggs glued together with sperm.
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Coral Spawning

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Compare the healthy coral on the left with the bleached coral on the right.
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Bleached Corals, Pacific Ocean

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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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Two nurse sharks hover over a baited cage
Lesson Plan

Connected Ecosystems

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Two nurse sharks hover over a baited cage
Lesson Plan

Symbiosis and Coral Anatomy

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