Emerald Crab
Mithraculus sculptus
A tiny green reef custodian with spoon-shaped claws.
Emerald Crabs blend into Caribbean algae with a deep green shell and fuzzy legs. They spend much of the night picking edible growth and scraps from rock and coral crevices.
Find this SeaPal in the card gallery
From field guide to game table
Bring this Emerald Crab home
See which ready-to-play decks feature this SeaPal. Try one in the simulator before you buy, or explore each full deck list.
- 1 copy
Ready-to-play deck
Coral Garden Deck
Includes 1 card featuring Emerald Crab.
- 1 copy
Ready-to-play deck
Murky Water Deck
Includes 1 card featuring Emerald Crab.
Quick dive
Creature passport
- Home
- Caribbean and western Atlantic reefs, rubble, rocks, and seagrass.
- Favorite foods
- Algae, detritus, leftover food, and tiny invertebrates.
- Size check
- Shell about 1.5 in (4 cm) across — cookie-sized
Tell-your-friends facts
Four wonderfully wild things
- 1
Its green color provides camouflage among algae.
- 2
Bristly legs help collect food and break up the crab's outline.
- 3
Like other crabs, it must molt its hard shell to grow.
- 4
A female carries developing eggs beneath her folded abdomen.
Ocean superpower
Built to be amazing
Flattened claw tips scrape algae from rough places other grazers miss.
Junior scientist tip
What should I look for?
Peer under reef ledges for green claws and hairy walking legs.
Grown-up research links
We used trusted science organizations to check this profile.