Home > Invertebrates > Crabs > Percnon affine

Updated 3/25/2013

Family Grapsidae

HAWAII

Percnon affine

Female, Sharks Cove, Oahu, 30 feet

 

Male, Sharks Cove, Oahu, 30 feet

Male, Lana'i Lookout, Oahu, 15 feet

BLUE-EYED ROCK CRAB

Occasional in holes and caverns in shallow water exposed to wave action.  Eyes are bright blue, upper surface of male claws dark brown.  Carapace width attains 3 inches.  Hawaii & the Indo-Pacific.