Sea slug is a common name for some marine invertebrates with varying levels of resemblance to terrestrial slugs. Most creatures known as sea slugs are gastropods, i.e. they are sea snails that, over evolutionary time, have either entirely lost their shells or have seemingly lost their shells due to having a significantly reduced or internal shell. The name "sea slug" is often applied to nudibranchs and a paraphyletic set of other marine gastropods without apparent shells.
Onchidoridoidea is a taxonomic superfamily of sea slugs, dorid nudibranchs, marine gastropod molluscs.
Aldisa is a genus of sea slugs, dorid nudibranchs, marine gastropod molluscs in the family Cadlinidae.
Onchidorididae are a taxonomic family of sea slugs, dorid nudibranchs, marine gastropod molluscs in the superfamily Onchidoridoidea.
The three-spot nudibranch, scientific name Aldisa trimaculata, is a species of sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Cadlinidae.
Aldisa albomarginata is a species of sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Cadlinidae.
Aldisa tara is a species of sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Cadlinidae.
Flabellina dana is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Flabellinidae.
Orienthella fogata is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusk in the family Flabellinidae.
Diaphorodoris is a genus of sea slugs, dorid nudibranchs, shell-less marine gastropod mollusks in the family Calycidorididae.
Adfacelina medinai is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Facelinidae.
Pauleo jubatus is a species of sea slug, specifically an aeolid nudibranch. It is a marine gastropod mollusc in the family Facelinidae. It is the only species in the genus Pauleo.
Eubranchus prietoi is a species of sea slug or nudibranch, a marine gastropod mollusc in the family Eubranchidae.
Knoutsodonta jannae is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Onchidorididae. It was frequently mis-identified as Onchidoris muricata. K. jannae is the type species of the genus Knoutsodonta.
Onchidoris derjugini is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Onchidorididae.
Onchidoris hystricina is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Onchidorididae.
Diaphorodoris luteocincta is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Calycidorididae.
Diaphorodoris mitsuii is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Calycidorididae.
Diaphorodoris papillata is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Calycidorididae.
Akiodoris salacia is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Onchidorididae.
