Felimare juliae (S.I. DaCosta, V. Padula& M. Schrödl, 2010)
Thorunna kahuna R.F. Johnson& T.M. Gosliner, 2001
Hypselodoris kaname K. Baba, 1994
Hypselodoris kanga W.B. Rudman, 1977
Mexichromis katalexis N. Yonow, 2001
Hypselodoris katherythros N. Yonow, 2001
Glossodoris katoi K. Baba, 1938
Hypselodoris kayae A.T. Young, 1967
Felimare kempfi (Ev. Marcus, 1971)
Goniobranchus kitae (T.M. Gosliner, 1994)
Glossodoris kophos N. Yonow, 2001
Felimida kpone (M. Edmunds, 1981)
Hypselodoris krakatoa T.M. Gosliner& R.F. Johnson, 1999
Felimida krohni (J.B. Vérany, 1846)
Chromodoris kuiteri W.B. Rudman, 1982
Doriprismatica kulonba (R.F. Burn, 1966)
Goniobranchus kuniei (A. Pruvot-Fol, 1930)
Noumea laboutei W.B. Rudman, 1986
Hypselodoris lacteola W.B. Rudman, 1995
Felimare lajensis (J.S. Troncoso, F.J. García& V. Urgorri, 1998)
Hypselodoris lalique J.A. Ortea & G.M. Caballer,2013
Glossodoris lamberti (J.C.H. Crosse, 1875)
Chromodoris lapinigensis L.S.R. Bergh, 1879
Felimare lapislazuli (H.W. Bertsch& A. Ferreira, 1974)
Chromodoris lata J.J. Risbec, 1928
Goniobranchus lekker (T.M. Gosliner, 1994)
Mexichromis lemniscata (J.R.C. Quoy& J.P. Gaimard, 1832)
Chromodoris lentiginosa W.H. Pease, 1871
Goniobranchus leopardus (W.B. Rudman, 1987)
Chromodoris lilybaetana J.C. García-Gómez, G. Cattaneo& R. Chemello, 2009
Felimare lilyeveae (A. Alejandrino& Á. Valdés, 2006)
Glossodoris limbata N. Vicente, 1967
Chromodoris lineolata (J.C. van Hasselt, 1824)
Chromodoris lochi W.B. Rudman, 1982
Goniobranchus loringi (G.F. Angas, 1864)