Sealife

Select a Category

An octopus with tentacles spread underwater

vulnerablesealife

Global Oceans

Common Octopus

Eight arms, three hearts, and a mind unlike any other.

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A bright orange sea star on a rocky tide pool

recoveringsealife

Pacific Coast of North America

Ochre Sea Star

A keystone species. A cautionary tale.

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A cuttlefish displaying vivid color patterns underwater

vulnerablesealife

Indo-Pacific & Mediterranean

Cuttlefish

The chameleon of the sea — and one of its great minds.

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A horseshoe crab on a sandy beach at the water edge

vulnerablesealife

Atlantic & Indo-Pacific Coasts

Horseshoe Crab

Older than the dinosaurs. Essential to modern medicine.

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vulnerablesealife

Indo-Pacific Deep Waters

Nautilus

A living fossil. A perfect spiral.

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A sea otter floating on its back in the ocean

recoveringsealife

North Pacific Coast

Sea Otter

The guardian of the kelp forest.

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A delicate seahorse clinging to coral underwater

vulnerablesealife

Shallow Coastal Waters Worldwide

Seahorse

The only animal where the male gives birth.

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A vivid colorful nudibranch sea slug on the ocean floor

thrivingsealife

Oceans Worldwide

Nudibranch

The most beautiful animal most people have never seen.

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A rainbow-colored mantis shrimp in a coral crevice

thrivingsealife

Tropical & Subtropical Oceans

Mantis Shrimp

Sixteen types of color receptors. The most complex eyes on Earth.

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A translucent moon jellyfish glowing in blue ocean water

thrivingsealife

Global Oceans

Moon Jellyfish

No brain. No heart. Older than the fish.

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A green sea turtle gliding through clear blue ocean water

recoveringsealife

Tropical & Subtropical Oceans

Green Sea Turtle

They have been crossing oceans since the age of dinosaurs.

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A massive whale shark gliding through blue ocean water

endangeredsealife

Tropical Oceans Worldwide

Whale Shark

The largest fish on Earth. Gentle. Endangered.

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A large sunflower sea star with many arms on the Pacific ocean floor

endangeredsealife

Pacific Coast, Alaska to Baja California

Sunflower Sea Star

The fastest sea star on Earth. Nearly gone in a decade.

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Intention Founder

Is your One Simple Thing not listed here?

Suggest a real animal, plant, ecosystem, watershed, insect, or sealife for the catalogue. If it passes review, you become its Intention Founder — the first person in the community to champion it.

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