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This rainbow sheen on the sea surface is what it looks like when the oil bubbles make it to the sea surface.
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Oily Sheen On Sea Surface

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Bull kelp (Nereocystis) becomes less valuable to grazers as it quickly rots.
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Nereocystis

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A shark swims above.
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A Shark's Toothy Grin

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A harp seal in icy water
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Harp Seal

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A fur seal in kelp
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Fur Seal

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A school of Atlantic bluefin tuna
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Atlantic Bluefin Tuna

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Ken Hall by his whale bone sculpture.
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Jigsaw Bones

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A shrimp boat fishes in the Gulf of Mexico
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A Gulf Shrimp Boat

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This watercolor painting shows William Dampier venturing into the unknown aboard a pirate ship.
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Dampier on the High Seas

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A school of akule (Hawaiian for bigeye scad) explode into a camera's frame.
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Akule Explosion

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Rough periwinkles sit on a bed of barnacles.
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Rough Periwinkles

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Participants in the challenge must first set a compass bearing in the direction they are headed to properly navigate underwater.
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Setting a Compass Bearing

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