Parasited by Sacculina carcini. See https://www.inaturalist.org/observations/192220998 for the parasite observation.
Character: Last pereopod flattened/ modified for swimming, front of carapax (in between the eyes) toothless
Systematics: crustacea,, malacostraca, swimming crabs
Habitat: kelp rock shells, 28-29m
Mode of life: