 The distribution of this genus is worldwide, found mainly on hard substrates, although Japanese species have been found on sandy bottoms.These snails occur from shallow waters to bathyal depths.The species in this genus are mainly herbivorous or feed on detritus, although a few have been observed to be omnivorous (Keen, 1975) or even carnivorous, feeding on a wide range of algae and on animals belonging to various other invertebrate phyla.