Also know as the grinder ray because of its flat grinding teeth used to crush its meal of crustaceans or invertebrates. Inhabits bays, sloughs, and kelp beds with sandy bottoms. The bat ray digs up food with its wings and snout, and will even bite off overhanging ledges to get at prey. It hunts singly or in groups. When resting, it buries itself in sand with just the eyes protruding. Edibility is poor. Range is from Oregon to the Gulf of California.