Cuthona antarctica is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Fionidae.RMolluscaBase eds. (2026). MolluscaBase. Cuthona antarctica (Pfeffer, 1886). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=532697 on 2026-03-03
Distribution This species was described from Antarctica.
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