Any of numerous chiefly marine invertebrates of the phylum Mollusca,typically having a soft unsegmented body,a mantle,and a protective calcareous shell and including the edible shellfish and the snails.

• 软体动物任一种无脊椎软体动物纲的海生动物，身体柔软且不分段，外有套膜，并具有保护性的钙质壳，包括可食用的有壳的水生动物和蜗牛