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Alvin, a human occupied vehicle (HOV), returns to the ship after a dive.
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From Submarines to Robots: Exploring the Deep Ocean

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coral polyps
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Healthy Coral Polyps

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an olive ridley turtle comes ashore
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Olive Ridley

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Mussels sit on the deep-sea floor.
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Norfolk Canyon Chemosynthetic Mussels

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Bundles of crystals form a woven pattern in parrotfish teeth.
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Crystal Orientation of Parrotfish Teeth

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a man sits pondering with a tan ball cap on
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Captain Stelly

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corals in shallow water with sunlight streaming through the surface
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Coral Reefs in the Sunlight

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spindles of magnified green algae
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Stringy Algae

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a sea angel spawns a cloud of eggs
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Sea Angel Spawns

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a round ball of a sea urchin nestled between rocks
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Toxic Nature of Flower Urchins

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a close up of a sand dollar
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Sand Dollar in the Sea Grass

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Rockhopper penguins in the Falkland Islands.
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Rockhopper Penguins

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