Comprehensive DescriptionRead full entry
Biology/Natural History: This species is mostly subtidal but can be found in the eelgrass at very low tides at Padilla Bay. It can bury itself in the sediment. 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, which catch them in eelgrass beds at low tide, flip them over, and eat their insides. Comes to intertidal algae-covered rocks in spring or early summer for mating, which occurs just after the female molts. In Hokkaido, Japan, mating occurs in May and June (Nagao and Munehara, 2003). Nagao and Munehara (2007) found that in Japan adult females of this species store sperm from one mating season to the next. Females isolated from males during a mating season nevertheless laid fertile eggs by fertilizing them with sperm stored from the previous season.