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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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a brittle star clings to a pink coral
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Deep-Sea Corals

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Japanese scientists videotaped this female giant squid, alive, at the water's surface
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Giant Squid

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two humpback whales swim underwater
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Whales and Dolphins

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Great hammerhead in Bimini, Bahamas.
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Sharks

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Chrysaora melanaster is a jellyfish found in the Arctic.
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Jellyfish and Comb Jellies

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An oil drilling platform in oil-free water two years after the Deepwater Horizon oil spill in the Gulf of Mexico.
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Gulf Oil Spill

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On average, Arctic sea ice has decreased by four percent per decade since the late 1970s.
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Sea Level Rise

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two mangrove trees in the crashing waves
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Mangroves

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a close up of bacteria
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Marine Microbes

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A harp seal in icy water
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Seals, Sea Lions, and Walruses

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