A mother and calf humpback whale swim in ocean.

Marine Mammals

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A harp seal in icy water

Seals, Sea Lions, and Walruses Overview

Are you a student researching seals or someone looking to learn more about sea lions? Love Walruses? This overview dives into everything to know.

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Featured Content

two humpback whales swim underwater

Whales and Dolphins

Narwhals with their long unicorn-like tusks.

Native Knowledge of the Narwhal

A Bryde's whale catches a meal

The Case of the Mystery Whale

a painting of a ship on a plate of baleen

The Story of Stashed Whale Baleen

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

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

Are You An Educator?

At Smithsonian Ocean, we have lesson plans, activities, and resources to help you engage your students in the wonders of our oceans.

see all lesson plans see marine mammal lesson plans

Marine Mammals Articles

A screenshot from the video showing illustration of a whale at the surface of water at night.

Life After Whale (On Whale Falls)

Thumbnail of a schematic of an island, boat, and a Right Whale.

Ocean Optimism Video - Slow Down For Right Whales

Thumbnail of a cartoonish whale swimming.

Why do Whales Sing?

Blue Whale Feeding

Photo of backside of manatee in an aquarium tank.

Mote Manatee Cam

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wildestanimal, flickr