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Snails and slugs - Gastropoda
Gastropods are the largest group of molluscs and contain about 70% of all mollusc species. They are well represented in Sydney and include turban snails, periwinkles, cowries, limpets, abalones, nerites and whelks, as well as freshwater snails, terrestrial snails and slugs (pulmonates) and sea slugs (opisthobranchs). Gastropod is a Greek word meaning 'stomach foot'. Although gastropods do move around on a large, sliding foot, it is not actually their stomach. The stomach is protected inside their shell. Most gastropods carry a single shell for protection and feed using a kind of rasping tongue with teeth called a radula.
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