Description : GIANT KEYHOLE LIMPET (Megathura crenulata)
Last Answer : Habitat: Rocky intertidal zone and rocky reefs of central California to Baja California. Size: 13 cm (5 in) shell length Position in food web: Omnivorous: feeds on algae and tunicates. Prey ... predators from being able to grip on to the limpet. Relatives: clams, octopuses, and nudibranchs