Portunus pelagicus (Linnaeus, 1758)
B. S. Galil
Last updated: November 6th, 2006
Blue swimming crab.
Neptunus (Portunus) pelagicus Fox, 1924
Neptunus pelagicus Fox, 1926
Portunus pelagicus Linnaeus, 1758
A medium-sized marine nocturnal crab (CL males: 7 cm, females: 6.5 cm), carapace greenish-brown with irregular pale mottling edged dark brown, chelipeds are purplish, mottled and fingers blue. Carapace broad, with transverse granulate lines. The front has four acute lobes and the antero-lateral margin bears nine triangular teeth, the last tooth is the largest, projecting laterally. Chelipeds are long, massive, spinous and ridged. A marine nocturnal crab. Active swimmer, but during inactive periods buries in sediment.