Felimare acriba (Er. Marcus & Ev. Marcus,1967)
Chromodoris adeima N. Yonow, 1984
Glossodoris aeruginosa W.B. Rudman, 1995
Chromodoris africana C.N.E. Eliot, 1904
Thorunna africana W.B. Rudman, 1984
Felimare agassizii (L.S.R. Bergh, 1894)
Chromodoris aila Er. Marcus, 1961
Hypselodoris alaini J.A. Ortea, J. Espinosa& Y. Buske, 2013
Chromodoris albescens (Schultz in R.A. Philippi,1836)
Noumea alboannulata W.B. Rudman, 1986
Durvilledoris albofimbria W.B. Rudman, 1995
Chromodoris albolimbata L.S.R. Bergh, 1907
Goniobranchus albomaculatus W.H. Pease, 1866
Goniobranchus albonares (W.B. Rudman, 1990)
Chromodoris albonotata L.S.R. Bergh, 1875
Goniobranchus albopunctatus A. Garrett, 1879
Goniobranchus albopustulosus (W.H. Pease, 1860)
Hypselodoris alboterminata T.M. Gosliner& R.F. Johnson, 1999
Goniobranchus alderi (C. Collingwood, 1881)
Goniobranchus alius (W.B. Rudman, 1987)
Miamira alleni (T.M. Gosliner, 1996)
Chromodoris alternata (R.F. Burn, 1957)
Felimare amalguae (T.M. Gosliner& H.W. Bertsch, 1988)
Chromodoris ambiguus W.B. Rudman, 1987
Ceratosoma amoenum (T.F. Cheeseman, 1886)
Hypselodoris andersoni H.W. Bertsch& T.M. Gosliner, 1989
Glossodoris angasi W.B. Rudman, 1986
Ardeadoris angustolutea (W.B. Rudman, 1990)
Chromodoris annae L.S.R. Bergh, 1877
Goniobranchus annulatus (C.N.E. Eliot, 1904)
Mexichromis antonii (H.W. Bertsch, 1976)
Hypselodoris apolegma (N. Yonow, 2001)
Thorunna arbuta (R.F. Burn, 1961)
Glossodoris ariponensis (E.F. Kelaart, 1859)
Ceratodoris armata C.N.E. Eliot, 1913