Crab – Emerald

Emerald Crab Care Tips:

Minimum Tank Size: 5 Gallons

Max Size: Up to 6.25cm (2½”)

Diet: Omnivore (Known to eat algae bubbles)

Temperament: Peaceful

Lifespan: Up to 4 years

Scientific Name:  Mithraculus Sculptus

Other Names: Green Clinging Crab

Coral Safe: Yes

Invertebrate Safe: Yes

Emerald crabs are one of the most popular species of true crabs in the hobby. Their scientific name is Mithraculus Sculptus but they are almost always referred to by their common name, the emerald crab. The emerald crab is a part of the Majidae family. Their maximum size is 2 ½” and they can live up to 4 years. Emerald crabs are omnivores but are known for eating and eradicating algae bubbles from aquariums. They will scavenge algae or leftover food in the tank. Emerald crabs have a minimum tank size of 5 gallons. They are peaceful and are both coral and invertebrate safe. Emerald crabs will often be seen hiding in the rocks. Boy crabs will develop much larger arms than females. Emerald crabs are capable of losing an arm/leg and growing them back.