Quicklinks

A hammerhead shark swims just underneath the surface of the water.

Sharks

Two whales swimming

Whales

Two penguins on a rocky shore.

Penguins

an ancient ocean seascape

Ocean Through Time

A colorful coral reef in blue ocean water.

Corals

a sea turtle

Sea Turtles

An iridescent jellyfish underwater.

Jellyfish & Comb Jellies

A satellite image of a hurricane.

Hurricanes Typhoons & Cyclones

Featured Content

Explore Map

Daily Catch

Photograph of a green sea slug, with white polka-dot-like markings and white-edged ruffly structures along the length of its back.

A Beautiful Sea Slug

The lettuce sea slug (Elysia crispata) has enlarged fleshy appendages that are folded over one another, with colors ranging from blue to green, with purple and red lining.  The sea slug eats green algae, and some of the green algae gets shuttled off to make a home in those fleshy appendages (called parapodia).

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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 Lesson Plans