Black-Fingered Coral Clinger

Cymo melanodactylus

The Black-fingered Coral Clinger, or Cymo melanodactylus, is a small crab species known for its unique appearance. It has a spiny carapace covered with short fur-like hairs and large pale blue eyes. Its claws typically have black fingers, although some individuals may have variations in claw color. A distinguishing feature from similar species is the presence of orange granulations on its carapace. This crab is found in the Indo-Pacific region, with its range extending from the Red Sea and Madagascar to New Caledonia and French Polynesia. It inhabits shallow waters, typically at depths of 1 to 10 meters, and is closely associated with Acropora corals. These crabs are obligate commensals, meaning they rely on these corals for habitat and food. They primarily feed on the mucus secreted by the corals, but also consume zooplankton and suspended particles. Divers might encounter these crabs nestled within the crevices of Acropora corals. They are harmless to humans and do not exhibit any aggressive behavior. The conservation status of the Black-fingered Coral Clinger has not been evaluated, but they are notable for their symbiotic relationship with coral reefs.