Palio gracilis is a species of sea slug, a nudibranch, a shell-less marine gastropod mollusc in the family Polyceridae.Caballer, M. (2015). Palio gracilis (Pease, 1971). In: MolluscaBase (2015). Accessed through: World Register of Marine Species on 2015-12-13.
Distribution This species was described from Huaheine, Society Islands as Triopa gracilis.
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