Molluscs are a diverse phylum of invertebrate animals that include snails, clams, and octopuses. The term is commonly used in biology and ecology, referring to the soft-bodied organisms often encased in shells. In everyday science writing, “molluscs” denotes multiple species within this phylum, contrasting with other invertebrate groups. The plural form is used in academic and field contexts as well as informal discourse among enthusiasts.
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