Emerald Crab

Mithraculus sculptus

Identification	Vivid green carapace with flattened, spade-like claws used for pulling algae from rocks. Smooth, slightly hairy body.
Maximum Length	2.5 inches
Origin	Caribbean
Minimum Tank Size	20 gallons
Reef Compatibility	Generally reef safe

Behavior

Primarily nocturnal. One of the only invertebrates that reliably consumes bubble algae (Valonia). Active grazer on live rock. Generally peaceful when well fed.

Diet & Feeding

Herbivore. Specializes in eating bubble algae, hair algae, and filamentous algae. Also scavenges detritus and meaty foods.

Cautions

May occasionally nip at fleshy LPS corals (Hammer, Frogspawn, Torch) or small clams when underfed. Keep well fed to prevent predatory behavior.