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Syllid fireworms can be found mainly on the seafloor, but they switch to a planktonic form to reproduce, where the females use bioluminescent signals.
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Syllid Fireworms

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Two nurse sharks hover over a baited cage
Lesson Plan

Fish Feeding

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Two nurse sharks hover over a baited cage
Lesson Plan

Coral Conservation

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Coral showing signs of disease
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Disease Takes Hold

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On Moorea, an island in French Polynesia, researchers are striving to complete a biocode—a DNA catalog of every life form big enough to pick up with tweezers.
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Scientists Catalog Life on the Island of Moorea

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This colony of Lophelia pertusa was photographed from the Mingulay Reef Complex off Scotland in 2005.
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Lophelia pertusa Colony

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This species of bamboo coral, discovered in 2004 in the Pacific Northwest, has unusually long and impressive tentacles.
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New Bamboo Coral

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Algae has overtaken this coral reef off heavily populated Kiritimati, or Christmas Island.
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Unhealthy Coral Reef, Kiritimi, Line Islands

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Crown of Thorns Starfish in the Marianas Islands
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Crown of Thorns Starfish

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Overfishing and sedimentation have heavily impacted this reef off the coast of Guam.
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Coral Reef in Distress

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This piece of pocillopora, or cauliflower coral, would normally have a rigid outer skeleton, but researchers dissolved it to expose the coral’s tissue and take a sample for DNA analysis.
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Cauliflower Coral - Pocillopora

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A coral catshark
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Coral Catshark

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