Arched Swimming Crab

Callinectes arcuatus

The Arched Swimming Crab, found along the Pacific coast from Los Angeles to Peru and northern Chile, is a species of swimming crab that inhabits coastal lagoons and estuaries. It thrives in tropical waters, tolerating a wide range of salinity levels from 1 to 65, and is typically found at depths of up to 40 meters, although it can occasionally be found as deep as 75 meters. This species is known for its benthic lifestyle, often residing in brackish environments. The diet of the Arched Swimming Crab is diverse, consisting of fish, mollusks, shrimp, and plant matter. This varied diet supports its role as a predatory species within its habitat. Reproduction involves a precopulatory courtship ritual, common among members of the order Decapoda, which includes indirect sperm transfer through olfactory and tactile cues. Divers encountering the Arched Swimming Crab may find them in coastal waters, especially in areas like the Golfo de Nicoya in Costa Rica, where a small fishery operates. Although the species is not currently evaluated by the IUCN, its presence in certain regions may fluctuate due to environmental factors and fishing pressures.