The Sea of Japan species list
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Phylum Mollusca Linnaeus, 1758
Class Gastropoda Cuvier, 1795
Subclass Heterobranchia Burmeister, 1837
Infraclass Opistobranchia Milne-Edwards, 1848
Order Sacoglossa Ihering, 1876
Family Limapontiidae Gray, 1847
Placida babai Ev.Marcus, 1982

Order Runcinacea Burn, 1963
Family Runcinidae H. Adams & A. Adams, 1854
Runcinida valentinae Chernyshev, 2006

Order Nudibranchia Cuvier, 1817
Family Cadlinidae Bergh, 1891
Cadlina laevis (Linnaeus, 1767)
Family Discodorididae Bergh, 1891
Diaulula sandiegensis (J. G. Cooper, 1863)
Rostanga alisae Martynov, 2003
Family Okadaiidae Baba, 1930
Vayssierea elegans (Baba, 1930)
Family Dendronotidae Allman, 1845
Dendronotus kamchaticus Ekimova, Korshunova, Schepetov, Neretina, Sanamyan & Martynov, 2015
Family Proctonotidae Gray, 1853
Janolus fuscus O’Donoghue, 1924
Family Dironidae Eliot, 1910
Dirona pellucida Volodchenko, 1941
Flabellinidae Bergh, 1889
Flabellina athadona (Bergh, 1875)
Flabellina trophina (Bergh, 1890)
Flabellina verrucosa (M. Sars, 1829)
Family Cuthonellidae Miller, 1971
Cuthona nana (Alder & Hancock, 1842)
Cuthonella soboli Martynov, 1992
Family Aeolididae Gray, 1827
Aeolidia papillosa (Linnaeus, 1761)