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The Phoenix Islands Protected Area site in Kiribati was inscribed on the World Heritage List in 2010. The site encompasses one of the world's largest intact oceanic coral archipelago ecosystems, together with 14 known underwater seamounts and other deep
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Phoenix Islands Protected Area, Kiribati

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On a healthy coral reef, fish (as well as many other organisms) thrive. Not only are reefs beautiful, but they are also critical to ocean health and human livelihoods.
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Healthy Coral Head

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Dr. Valerie Paul, director of the Smithsonian Marine Station at Fort Pierce, Fla., examines tropical seaweeds on northwestern Guam’s coral reefs.
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Diving in Guam

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

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a display case of red coral jewelry containing necklaces, earrings, bracelets, and rings
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Avoid Coral Jewelry

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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.
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Shallow Coral Reef Foraminifers

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The Belize Barrier Reef Reserve System consists of the largest barrier reef in the northern hemisphere, offshore atolls, and several hundred sand cays, mangrove forests, coastal lagoons, and estuaries. The system's seven sites illustrate the evolutionary h
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Charles Darwin's Ocean Upwelling

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A "reef hotel" made of PVS layers on the seafloor.
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Worth the Investment: Ocean Real Estate Reveals Hidden Diversity

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The coastline of American Samoa National Marine Sanctuary
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The Reefs of American Samoa: A Story of Hope

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The coastline of American Samoa National Marine Sanctuary
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American Samoa National Marine Sanctuary

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Pink crustose algae covers the surface of a rock.
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Microbes Help Corals Pick a Home and Settle Down

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