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Mollusks in the classes gastropod (snails, slugs, nudibranchs) and bivalves (clam, mussels) move with a muscular foot. In the class of cephalopods, the foot has become 8 tentacles and no longer is used for movement. In this case, they use jet propulsion and water propels them away from predators or towards prey.

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∙ 17y ago

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