Marbled Swimming Crab

Callinectes marginatus

The Marbled Swimming Crab, known scientifically as Callinectes marginatus, is a member of the Portunidae family, recognized for its distinctive carapace that features nine spines behind each eye. The last spine is notably longer than the others, contributing to a carapace width of approximately 10 centimeters. This species is found primarily in the Atlantic Ocean, ranging from the Cape Verde Islands and the African coast from Mauritania to Angola, and extending to southeastern Florida and Brazil. It inhabits shallow saltwater environments, often in brackish waters of estuaries, sandy or sandy mud bottoms, and is associated with habitats like algae and grass flats, sandy beaches, rocky pools, and mangrove edges. The Marbled Swimming Crab is a benthopelagic creature, typically found at depths ranging from 1 to 421 meters, though it is rarely seen in the open sea. It is an opportunistic omnivore, with a preference for animal prey. The species exhibits typical decapod reproductive behavior, including a precopulatory courtship ritual involving olfactory and tactile cues. Mating usually involves indirect sperm transfer. Divers encountering the Marbled Swimming Crab may find it burrowing in mudflats or moving across sandy bottoms. Observing this crab in its natural habitat can provide insight into its ecological role and behavior.