biology; elementary science; life science; home school; Real Science-4-Kids; gastropod; bivalve; cephalopod; mollusk; Mollusca; radulaSnails are a type of mollusk. Mollusks are in the scientific group Mollusca and are soft-bodied animals that live in oceans and lakes and on land. The three types of mollusks are gastropods (snails and slugs), bivalves (clams and oysters), and cephalopods (octopuses and squids). All mollusks have organs and a mantle...