Adults are found in the algal zone of rocky shores (Ref. 35388). Usually solitary or in pairs with young. Females lay about 1,000 eggs in a nest of algae; the nest is guarded by the male (Ref. 35388). Feed mainly on crustaceans but also fishes and mollusks (Ref. 4742) and worms (Ref. 35388). Oviparous (Ref. 205).