Project Description

A small butterfly crab (Cryptolithodes typicus) was noticed perched up high on the tip of a rock.  This is an unusual posture as other times I’ve encountered a butterfly crab all if its legs and claws are tucked up under the carapace out of sight.  I didn’t see eggs on her underside with hatching larvae swimming away, which is one reason a crab sits up high.  Maybe this butterfly crab was just letting me know I was too close to its hangout!  The butterfly crab has many colour variations, with a carapace width of about three inches (7.6 cm).  Its range is from southern Alaska to southern California.