Biology/Natural History: This crab decorates more liberally than any of the other decorator crabs in this area. During decoration, pieces of material are attached to specialized hooked setae and also interact with pappose setae. The crab's chelae are small and delicate. In males the chelipeds are longer than the walking legs, but in females they are shorter. Will eat carrion. Predators include Pacific halibut (Hippoglossus stenolepis). In Puget Sound area, eggs may be carried during most seasons. Recently hatched eggs are orange-red; eggs nearly ready to hatch are reddish-brown.