Nudibranch is a noun for a colorful, often flamboyant sea slug lacking a protective shell. In marine biology, it denotes a wide variety of soft-bodied, shell-less mollusks that display intricate gill structures and striking patterns. The term combines two roots: 'nudus' (naked) and 'branchia' (gills), reflecting their exposed gill arrangements. Expect precise, taxonomy-informed usage in scientific and educational contexts.
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