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A harp seal in icy water
Overview

Seals, Sea Lions, and Walruses

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

Why a Tusk? The real-life unicorns of the sea and the tusks that make them famous

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Two nurse sharks hover over a baited cage
Lesson Plan

Hawaiian Islands Humpback Whale Activity Book

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A right whale breaches, lifting its huge body out of the water.
Overview

North Atlantic Right Whale

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An unidentified earplug from the National Museum of Natural History collection.
Article

Ocean Objects of Wonder

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an elephant seal with a tracker
Article

Citizens of the High Seas

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Two Southern Resident killer whales.
Article

There are More Whales out There Than We Thought

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a wet river otter face
Article

Fecal Insights: How River Otters Help Us Understand Parasites and Ecosystem Health

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A hippopotamus-like creature swims underwater
Article

Flippers or Feet? An Extinct Mammal May Have Been Replaced By Today's Sea Cows

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Fossil Whale Digsite at Cerro Ballena, Chile
Article

The Whale Graveyard Whodunit

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Blue whale skull being installed at National Museum of Natural History.
Article

When Did Today’s Whales Get So Big?

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A beaked whale at the ocean's surface
Article

Seeing with Sound: Acoustic monitoring of beaked whales

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