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Tree corals like this Calyptrophora bayer can grow several meters high and resemble brightly colored trees.
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Red Tree Coral

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The pink strands of this coral harbor a variety of organisms. Sea whips are gorgonian corals, with flexible skeletons.
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Sea Whip Coral

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: A thicket of Lophelia pertusa, a widespread deep sea coral, shelters a squat lobster.
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Coral Thicket with Lobster

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These deep-sea corals at the Madison-Swanson Marine Reserve are protected, along with the marine life they harbor.
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Protected Deep-sea Corals

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A rockfish finds refuge in a red tree coral, a deep-sea coral in the Olympic Coast National Marine Sanctuary.
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Rockfish Sheltering in Coral

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Unlike the shallow tropical coral reef at left, the deep-sea Oculina reef at right does not require sunlight.
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Shallow and Deep-Sea Coral Reefs

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A close-up photo of the seeds on the plant Phragmites australis.
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Phragmites australis, seeds

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A silhouette of a small boat carrying 8 passengers on tranquil water, with a pink horizon.
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Carteret Islands Row

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A Gulf Coast resident sits on his boat, smiling for the camera.
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Smiling Gulf Coast Man

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A fish from a deep underwater expedition sits preserved on a bed of ice.
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Fish on Ice

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The Arctic is one of the most undiscovered areas of the world.
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Launching an ROV

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A small, brown eelpout fish.
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Adolf’s Eelpout

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