Labels:ball | bulletin board | cephalopod | door | earth | octopod | octopus | person | sky OCR: MOLLUSKS OLLUSKS are soft -bodied organs There are three groups of invertebrates that normally mollusks. Gastropods, such as snails have shell for proteci tion typical and whelks. have one spirally coiled mollusk has head. muscular foot shell. Bivalves such as clams mussels, and hump that contains the body and oysters have two shells. The third group of mollusks, called cephalopods Hump includes octopuses cuttlefish and squids Cuttlefish and squids have an internal shell; octopuses have no shell at all All cephalopods have arms or tentacles Marine mollusk Like all other cephalopods, octo puses live in water, which Arm can support their large, sof body They move by e |Head propul Ision, by forcing water Siphon Sucker ou hole called a siphon. octopuse propulsion
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