TankHaven
Emerald Crab (Mithraculus sculptus)

Emerald Crab

Mithraculus sculptus

saltwatereasy to keepcrabpeacefulswims bottomreef-safe with caution

Bought to eat bubble algae. Feed it once the algae runs out, or it starts looking at corals.

In a reef: may pick at corals if underfed.

Adult size
2 in
Smallest tank
10 gal
Keep them in groups of
1+
Temperature
74–82 °F
pH
8–8.4
Food
Omnivore: eats bubble algae; supplement with nori
Start a saltwater build to add this

Gets along with

Cerith SnailBlue-leg Hermit CrabNassarius SnailAstrea SnailYellow Clown GobyScarlet Reef Hermit CrabTrochus SnailNeon Goby

Think twice about

Blue Devil Damselfish — too aggressive for itValentini Puffer — eats snails, crabs and shrimp and nips coralsDwarf Fuzzy Lionfish — too aggressive for itMaroon Clownfish — too aggressive for itSnowflake Moray Eel — eats crabs, shrimp and small fishPicasso Triggerfish — eats invertebrates and rearranges rock

Easy corals it leaves alone

Duncan CoralBlastomussaPulsing XeniaZoanthidsCandy Cane CoralRicordea Mushroom

Care ranges are typical hobby guidance and vary by source and by where the animal came from. Ask your supplier and watch your own tank. Spot a mistake on this page? Let me know.