Sponge-dwelling
Guides
Paracerceis
Paracerceis is a genus of marine isopod crustaceans in the family Sphaeromatidae, established by Hansen in 1905. The genus comprises at least 13 described species distributed across tropical and temperate coastal regions. The best-studied species, Paracerceis sculpta, has become a model organism for research on alternative reproductive tactics and sexual selection due to its unusual system of three discrete male morphs. Several species have been introduced outside their native ranges, including P. sculpta in Australia and Türkiye.