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A walrus sits on top of ice.
Photo

One Hundred Names for Sea Ice

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A mother and calf humpback whale swim side-by-side.
Photo

Mother and Calf

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Hawaiian monk seals are among the wildlife found within the Papahānaumokuākea World Heritage Site.
Slideshow

Backbone of Biodiversity at Risk

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A beluga whale
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Baby Beluga

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A gray seal on the shores of Surtsey, Iceland.
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A Unique World Heritage Site: Surtsey, Iceland

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A harp seal in icy water
Overview

Seals, Sea Lions, and Walruses

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In 2011, storms and lack of ice-cover due to a warmer winter climate resulted in hundreds of seal pups being washed up on the shore of Prince Edward Island. Like many, this young seal faced an uncertain future. See more Nature's Best Photos.
Article

Ice-Loving Seals and the Loss of Sea Ice

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Ari Friedlaender, a research scientist at the Duke University Marine Lab, tags a blue whale.
Article

Acrobatic Blue Whales Do the Twist While Feeding

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Phoenix swimming with her calf.
Article

Scientists Use Bioacoustics to Protect Marine Mammals

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A Bryde's whale catches a meal
Article

The Case of the Mystery Whale

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An adult giant squid battles its only known predator - a sperm whale.
Photo

Battle with a Sperm Whale

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Walruses use sea ice as platforms on which to nurse their young and launch their dives.
Article

Walrus: An Arctic Mammal in Peril?

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