Pacifastacus

Pacifastacus leniusculus

Pacifastacus leniusculus, Dana 1852

Common name(s):
Signal Crayfish

Size:
Up to 15 cm in length, from tip of rostrum to end of telson.

Identification:
Bluish/brown to reddish/brown in color. Muscular, large smooth claws. White patch near claw hinge.