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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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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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Waves breaking on the shore
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Currents, Waves, and Tides

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Two Adélie penguins on Paulet Island, Antarctica
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Penguins

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Corals, sponges, and algae are the major components of most coral reef communities as shown in this picture.
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Corals and Coral Reefs

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A sea turtle swimming
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Sea Turtles

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