• Okenia Menke, 1830
• Okenia academica Camacho-García & Gosliner, 2004
• Okenia africana Edmunds, 2009 accepted as Ceratodoris africana (Edmunds, 2009)
• Okenia ameliae Ortea, Moro & Caballer, 2014
• Okenia amoenula (Bergh, 1907)
• Okenia angelensis Lance, 1966 accepted as Bermudella angelensis (Lance, 1966)
• Okenia angelica Gosliner & Bertsch, 2004
• Okenia ascidicola M. P. Morse, 1972
• Okenia aspersa (Alder & Hancock, 1845)
• Okenia atkinsonorum Rudman, 2007 accepted as Ceratodoris atkinsonorum (Rudman, 2007)
• Okenia aurorapapillata Paz-Sedano & Pola, 2021
• Okenia babai Hamatani, 1961
• Okenia barnardi Baba, 1937 accepted as Ceratodoris barnardi (Baba, 1937)
• Okenia brunneomaculata Gosliner, 2004 accepted as Bermudella brunneomaculata (Gosliner, 2004)
• Okenia cochimi Gosliner & Bertsch, 2004 accepted as Goniodoridella cochimi (Gosliner & Bertsch, 2004)
• Okenia cupella (Vogel & L. P. Schultz, 1970) accepted as Cargoa cupella Vogel & L. P. Schultz, 1970
• Okenia digitata (Edmunds, 1966) accepted as Ceratodoris digitata (Edmunds, 1966)
• Okenia distincta Baba, 1940 accepted as Bermudella distincta (Baba, 1940)
• Okenia echinata Baba, 1949
• Okenia elegans (Leuckart, 1828)
• Okenia elisae Paz-Sedano & Pola, 2021 accepted as Ceratodoris elisae (Paz-Sedano & Pola, 2021)
• Okenia eolida (Quoy & Gaimard, 1832) accepted as Ceratodoris eolida (Quoy & Gaimard, 1832)
• Okenia evelinae Er. Marcus, 1957 accepted as Bermudella evelinae (Er. Marcus, 1957)
• Okenia felis Gosliner, 2010 accepted as Goniodoridella felis (Gosliner, 2010)
• Okenia ghanensis Edmunds, 2009 accepted as Cargoa ghanensis (Edmunds, 2009)
• Okenia hallucigenia Rudman, 2004 accepted as Ceratodoris hallucigenia (Rudman, 2004)
• Okenia harastii Pola, Roldán & Padilla, 2014 accepted as Bermudella harastii (Pola, Roldán & Padilla, 2014)
• Okenia hiroi (Baba, 1938) accepted as Ceratodoris hiroi (Baba, 1938)
• Okenia hispanica Á. Valdés & Ortea, 1995
• Okenia impexa Er. Marcus, 1957 accepted as Cargoa impexa (Er. Marcus, 1957)
• Okenia impexa banyulensis Schmekel, 1979 accepted as Okenia problematica Pola, Paz-Sedano, Macali, Minchin, Marchini, Vitale, Licchelli & Crocetta, 2019 accepted as Cargoa problematica (Pola, Paz-Sedano, Macali, Minchin, Marchini, Vitale, Licchelli & Crocetta, 2019)
• Okenia japonica Baba, 1949 accepted as Bermudella japonica (Baba, 1949)
• Okenia kendi Gosliner, 2004 accepted as Ceratodoris kendi (Gosliner, 2004)
• Okenia kondoi (Hamatani, 2001) accepted as Ceratodoris kondoi (Hamatani, 2001)
• Okenia lambat Gosliner, 2004 accepted as Ceratodoris lambat (Gosliner, 2004)
• Okenia leachii (Alder & Hancock, 1854)
• Okenia leachii var. quadricornis (Montagu, 1813) accepted as Okenia aspersa (Alder & Hancock, 1845)
• Okenia liklik Gosliner, 2004 accepted as Naisdoris liklik (Gosliner, 2004)
• Okenia longiductis Pola, Paz-Sedano, Macali, Minchin, Marchini, Vitale, Licchelli & Crocetta, 2019 accepted as Bermudella polycerelloides Ortea & Bouchet, 1983
• Okenia luna Millen, Schrödl, Vargas & Indacochea, 1994
• Okenia mediterranea (Ihering, 1886)
• Okenia mellita Rudman, 2004 accepted as Ceratodoris mellita (Rudman, 2004)
• Okenia mexicorum Gosliner & Bertsch, 2004 accepted as Goniodoridella mexicorum (Gosliner & Bertsch, 2004)
• Okenia mica Ortea & Moro, 2014 accepted as Bermudella mica (Ortea & Moro, 2014)
• Okenia mija Burn, 1967 accepted as Bermudella mija (Burn, 1967)
• Okenia miramarae Ortea & Espinosa, 2000 accepted as Goniodoridella miramarae (Ortea & Espinosa, 2000)
• Okenia modesta (A. E. Verrill, 1875) accepted as Okenia aspersa (Alder & Hancock, 1845)
• Okenia nakamotoensis (Hamatani, 2001) accepted as Ceratodoris nakamotoensis (Hamatani, 2001)
• Okenia nakanoae Paz-Sedano & Pola, 2021 accepted as Ceratodoris nakanoae (Paz-Sedano & Pola, 2021)
• Okenia nodosa (Montagu, 1808)
• Okenia opuntia Baba, 1960
• Okenia pellucida Burn, 1967 accepted as Bermudella pellucida (Burn, 1967)
• Okenia picoensis Paz-Sedano, Ortigosa & Pola, 2017 accepted as Goniodoridella picoensis (Paz-Sedano, Ortigosa & Pola, 2017)
• Okenia pilosa (Bouchet & Ortea, 1983) accepted as Ceratodoris pilosa (Bouchet & Ortea, 1983)
• Okenia plana Baba, 1960 accepted as Ceratodoris plana (Baba, 1960)
• Okenia plebeia (Bergh, 1902) accepted as Ceratodoris plebeia (Bergh, 1902)
• Okenia polycerelloides (Ortea & Bouchet, 1983) accepted as Bermudella polycerelloides Ortea & Bouchet, 1983
• Okenia problematica Pola, Paz-Sedano, Macali, Minchin, Marchini, Vitale, Licchelli & Crocetta, 2019 accepted as Cargoa problematica (Pola, Paz-Sedano, Macali, Minchin, Marchini, Vitale, Licchelli & Crocetta, 2019)
• Okenia pulchella (Alder & Hancock, 1854)
• Okenia purpurata Rudman, 2004 accepted as Bermudella purpurata (Rudman, 2004)
• Okenia purpureolineata Gosliner, 2004 accepted as Bermudella purpureolineata (Gosliner, 2004)
• Okenia pusilla Sordi, 1974 (uncertain > nomen dubium)
• Okenia quadricornis (Montagu, 1813) accepted as Okenia aspersa (Alder & Hancock, 1845)
• Okenia rhinorma Rudman, 2007
• Okenia rosacea (MacFarland, 1905) accepted as Ceratodoris rosacea (MacFarland, 1905)
• Okenia sapelona Ev. Marcus & Er. Marcus, 1967 accepted as Ceratodoris sapelona (Ev. Marcus & Er. Marcus, 1967)
• Okenia siderata Paz-Sedano & Pola, 2021 accepted as Bermudella siderata (Paz-Sedano & Pola, 2021)
• Okenia stellata Rudman, 2004 accepted as Ceratodoris stellata (Rudman, 2004)
• Okenia tenuifibrata Paz-Sedano & Pola, 2021 accepted as Ceratodoris tenuifibrata (Paz-Sedano & Pola, 2021)
• Okenia vancouverensis (O'Donoghue, 1921) accepted as Ceratodoris vancouverensis (O'Donoghue, 1921)
• Okenia vena Rudman, 2004 accepted as Bermudella vena (Rudman, 2004)
• Okenia virginiae Gosliner, 2004 accepted as Ceratodoris virginiae (Gosliner, 2004)
• Okenia zoobotryon (Smallwood, 1910) accepted as Bermudella zoobotryon (Smallwood, 1910)