Molluscs are a species-rich and morphologically diverse group of animals. This display features Gastropoda (snails and slugs) while the neighbouring display has species belonging to Polyplacophora (chitons), Scaphopoda (tusk shells), Bivalvia (mussels and clams), and Cephalopoda (squids, octopuses and cuttlefish). Molluscs include snails and slugs that crawl over the soil and seabed, clams that burrow into mud, and squid that can hover and jet through the water. In size, molluscs range from millimetre-long microsnails to giant squids as long as a bus. They include snails that graze on algae and plants, bivalves that strain plankton from the water as well as remarkable predators such as octopuses, drilling whelks and venomous cone snails.