Nudibranch
Nudibranchia
A shell-free sea slug dressed in impossible colors.
Nudibranchs are soft sea slugs whose dazzling colors can advertise danger or hide them in plain sight. Each species has a favorite menu, from sponges and hydroids to anemones and even other nudibranchs.
Find this SeaPal in the card gallery
From field guide to game table
Bring this Nudibranch home
See which ready-to-play decks feature this SeaPal. Try one in the simulator before you buy, or explore each full deck list.
- 2 copies
Ready-to-play deck
Disruption Deck
Includes 2 cards featuring Nudibranch.
Quick dive
Creature passport
- Home
- Oceans worldwide, from tide pools and coral reefs to the deep seafloor.
- Favorite foods
- Sponges, hydroids, anemones, bryozoans, eggs, or other slugs, by species.
- Size check
- From rice-grain tiny to about 12 in (30 cm); many are thumb-sized
Tell-your-friends facts
Four wonderfully wild things
- 1
Adult nudibranchs have no protective outer shell.
- 2
The name means naked gills, referring to exposed breathing structures.
- 3
Head horns called rhinophores sense chemicals dissolved in water.
- 4
Every nudibranch has both male and female reproductive organs.
Ocean superpower
Built to be amazing
Some steal unfired stinging cells from prey and reuse them for defense.
Junior scientist tip
What should I look for?
Look for a colorful slug with bunny-ear rhinophores or feathery back gills.
Grown-up research links
We used trusted science organizations to check this profile.