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Arctic Tern on the Inner Farne Island.
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Arctic Tern

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Two nurse sharks hover over a baited cage
Lesson Plan

Trophic relationships in Arctic marine ecosystems

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Looking through this iceberg's reflection in the Antarctic water, you can see the iceberg below the surface—some 90% of its total volume.
Overview

The Arctic and The Antarctic

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Two nurse sharks hover over a baited cage
Lesson Plan

Realms of the Arctic Ocean: pelagic, benthic and sea ice

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Two nurse sharks hover over a baited cage
Lesson Plan

Expedition to the Poles

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Two nurse sharks hover over a baited cage
Lesson Plan

Benthic Communities of the Arctic Ocean

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Despite the cold and dark environment, soft-bodied animals like anemones abound under the ice in the Antarctic.
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Anemone in Cold Antarctic Water

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A walrus sits on a floating piece of ice.
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Walrus on Ice

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A photo of Oceana's ice class research vessel, the Hanse Explorer, on the Baltic Sea.
Slideshow

Biodiversity in the Baltic Sea

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Two nurse sharks hover over a baited cage
Lesson Plan

Consequences of Arctic Climate Change

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Two nurse sharks hover over a baited cage
Lesson Plan

Frozen Out

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A narwhal breaches the surface, its tusk pointed to the sky
Photo

Tusks of Mystery

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