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Aka the Hairy helmet crab. The Bristly crab is covered in setae, the bristly like projections. In some of the pictures it is using its pincers to tear off algea, which it eats. Carapace was about 8 cm.
Spotted in a tide pool at low tide.
Eats a variety of food, such as eelgrass, eelgrass detritus, snails, algae, worms, and bivalves. Predators include sea otters and fur seals, the rosylip sculpin (Aschelichthys rhodorus), and gulls.