Malacostraca

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Traskorchestia traskiana

Size:
Traskorchestia traskiana reaches a maximum of about 2cm at full maturity.

Oregonia gracilis (Dana, 1851)

Common Name: Decorator Crab

Size:
Up to 50 mm across at the carapace (including legs approximately 3x carapace measurement).

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.

Pagurus granosimanus (Stimpson, 1858)

Common name(s): Grainy hermit crab

Identification:
Lives in snail shell. First pair of walking legs unequal with pincers, right one larger.

Claws covered with fine granules.

Pandalus danae (Stimpson, 1857)

Common Name: The Coonstripe Shrimp

Dorsal view of H. oregonensis

Ventral view of a male H. oregonensis

Hemigrapsus oregonensis (Dana, 1851)

Common name(s): Yellow shore crab, green shore crab, hairy shore crab

Hemigrapsus nudus (Dana, 1851)

Common name(s): Purple shore crab, purple shore crab, naked shore crab

Size:
Up to 4 - 5.6cm when fully grown.

Range:
Rocky and gravely beaches of western North America, from Alaska to Baja California.

Callianassa californiensis, Dana 1854

Common name(s):
The Bay Ghost Shrimp, and by fisherman as Bass yabbies or one-armed bandits.

Adult

Juvenile

Cancer productus

Common Name: The Red Rock Crab

Head & Antenna 1 & 2

Gills and 2nd Gnathopod