Okenia
o-Garcia & Gosliner, 2004
Okenia africana Edmunds, 2009
Okenia amoenula (Bergh, 1907)
Okenia angelensis Lance, 1966
Okenia angelica Gosliner & Bertsch, 2004
Okenia ascidicola M.P. Morse, 1972
Okenia aspersa (Alder & Hancock, 1845)
Okenia atkinsonorum Rudman, 2007
Okenia barnardi Baba, 1937
Okenia brunneomaculata Gosliner, 2004
Okenia cochimi Gosliner & Bertsch, 2004
Okenia cupella (Vogel & Schultz, 1970)
Okenia dautzenbergi Vayssière, 1919
Okenia digitata (Edmunds, 1966)
Okenia distincta Baba, 1940
Okenia echinata Baba, 1949
Okenia elegans (Leuckart, 1828) - type species
Okenia felis Gosliner, 2010
Okenia hallucigenia Rudman, 2004
Okenia hiroi (Baba, 1938)
Okenia hispanica Valdes & Ortea, 1995
Okenia impexa Er. Marcus, 1957
Okenia japonica Baba, 1949
Okenia kendi Gosliner, 2004
Okenia kondoi (Hamatani, 2001) - originally described as Sakishimaia kondoi Hamatani, 2001
Okenia lambat Gosliner, 2004
Okenia leachii (Alder & Hancock, 1854)
Okenia liklik Gosliner, 2004
Okenia luna Millen, Schrödl, Vargas, & Indacochea, 1994
Okenia mediterranea (Ihering, 1886)
Okenia mellita Rudman, 2004
Okenia mexicorum Gosliner & Bertsch, 2004
Okenia mija Burn, 1967
Okenia miramarae Ortea & Espinosa, 2000
Okenia modesta (A. E. Verrill, 1875)
Okenia nakamotoensis (Hamatani, 2001)
Okenia pellucida Burn, 1967
Okenia pilosa (Bouchet & Ortea, 1983)
Okenia plana Baba, 1960
Okenia pulchella Alder & Hancock, 1854
Okenia purpurata Rudman, 2004
Okenia purpureolineata Gosliner, 2004
Okenia quadricornis (Montagu, 1815)
Okenia rhinorma Rudman, 2007
Okenia rosacea (MacFarland, 1905)
Okenia stellata Rudman, 2004
Okenia vancouverensis (O'Donoghue, 1921)
Okenia vena Rudman, 2004
Okenia virginiae Gosliner, 2004
Okenia zoobotryon (Smallwood, 1910)