Button Crab

Exopalicus maculatus

The Button Crab, scientifically known as Exopalicus maculatus, is a member of the family Palicidae within the order Decapoda. It is primarily found in the Indo-Pacific region, with notable occurrences in French Polynesia, including the Marquesas, Society, Austral, Tuamotu, and Gambier islands. This species inhabits benthic environments, typically residing at depths ranging from the surface to 100 meters. The Button Crab is part of a diverse group of crustaceans known for their distinctive mating behaviors, which often involve precopulatory courtship rituals utilizing olfactory and tactile cues. Divers encountering the Button Crab might observe its unique behavior and habitat preferences. As a benthic species, it is often found on the sea floor, where it may engage in indirect sperm transfer during mating. Divers should approach with care to observe its natural behaviors without causing disturbance.