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An iceberg calves from Antarctica's Pine Island Glacier
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Pine Island Glacier

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Seagrass species come in many different shapes and sizes, as illustrated by this conceptual diagram of some common seagrass species.
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Seagrass Diversity

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Chelsea Rochman dissects a dorado caught by the crew to see if it had eaten plastic. Nearly 10 percent of all fish collected on the expedition had plastic in their systems.
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Dorado Dissection

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A privateer was a seaman with a license from his country's government to attack enemy ships. The government usually got a share of the profits.
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Privateer definition

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A diver collects water samples.
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Scientists Collect Samples for Ocean Sampling Day

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On a healthy coral reef, fish (as well as many other organisms) thrive. Not only are reefs beautiful, but they are also critical to ocean health and human livelihoods.
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Healthy Coral Head

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A veined octopus briefly leaves its hiding place, a shell, to devour a crab.
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Octopus Eating a Crab

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Walruses use sea ice as platforms on which to nurse their young and launch their dives.
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Walrus: An Arctic Mammal in Peril?

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A walrus sits on top of ice.
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The Cultural Icescapes of the Arctic

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A researcher holds an arm bone from a "toothed" mysticete whale from Vancouver Island.
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Dispatches from the Field: Treacherous stream crossings and a new fossil find

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a fringed fossil feather star
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Ancient Crinoid

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