Glebocarcinus oregonensis

It is usually red/brown but this may vary; their legs have many setae (hairs). The carapace reaches a width of about 5 centimetres (2 in), and is widest at the 7th or 8th lateral tooth.[2] The chelipeds are black at the tip, and the dactylus of the cheliped has no spiny ridges; the dorsal surface is covered with small tubercles (rounded projections), and males have larger chelipeds than females.[3]

Glebocarcinus oregonensis is found mostly in crevices, holes (dead barnacles) and under rocks.[3] They can live in depths of up to 1,400 feet (430 m).[2] They are nocturnal feeders, feeding mostly on small barnacles, snails, bivalves, worms, green algae and Pacific oysters.[3] Predators include Pacific cod, river otters and red rock crab.[3]

Breeding occurs during the summer, and the Puget Sound females carry eggs from November to May.[3] It is not unusual to find harems consisting of one male with as many as seven females.[3] Males may carry females that are molting and continue until their new shell hardens, for mating occurs after females molt.[3]

• Eugene N. Kozloff & Linda H. Price (1996). Marine invertebrates of the Pacific Northwest. University of Washington Press. ISBN 978-0-295-97562-7.