SNAIL, a MOLLUSC belonging to the class Gastropoda, has a soft body enclosed in a hard shell. Gastropod means "stomach-foot," a reference to the fleshy, muscular foot running along the underside of the animal, on which it moves about. The snail can retract its body into the shell for protection. It uses its radula, or rasp-like tongue, to feed on plants and/or animals. Carnivorous sea snails use the radula to drill through the shells of CLAMS, MUSSELS and BARNACLES and to rasp out the soft...

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