Green Emerald Crab
Emerald Crab (Mithraculus sculptus).
Available for local pickup only
Bring balance and natural algae control to your reef tank with the Green Emerald Crab — a favorite among reef keepers for tackling nuisance bubble algae.
These bright green, hardy crabs are not only effective cleaners but add a splash of personality and movement to your live rock and reefscape. Known for their spoon-shaped claws, they can reach into tight crevices that other grazers can’t, making them the perfect addition to your clean-up crew!
Key Care Information
✅ Size: Up to 1.5–2 inches wide when mature.
✅ Temperament: Generally peaceful — mostly active at night.
✅ Reef Safe: Yes! 100% reef safe with corals and inverts when well-fed. May nibble on soft corals if hungry, so occasional feeding helps.
✅ Diet: Omnivorous — thrives on bubble algae, hair algae, film algae, leftover food, and meaty bits like mysis or brine shrimp.
✅ Behavior: Loves to hide during the day and emerge at dusk to clean your rocks.