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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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Convict surgeonfish are the roaming sheep of the reef but, instead of noshing on grass, they feed on algae.
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Helpful Herbivores

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Nuclear bomb in Bikini Atoll
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Naturally Resilient

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Neptune grass (Posidonia oceanica) is a slow-growing and long-lived seagrass native to the Mediterranean.
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Bugs and Slugs: The Hidden Secret to Healthy Seagrasses

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Seagrasses are flowering plants that can form dense underwater meadows and are an important shallow water habitat.
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Seagrass and Seagrass Beds

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Cartoon t-shirts with got plankton.
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The Cloud Factories that Live in the Sea

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