| Scientific Name | Author | English Name |
|---|---|---|
| Thuridilla undula | Gosliner, 1995 | Wavy sapsucking slug |
| Thuridilla vataae | (Risbec, 1928) | Sap-sucking slug |
| Thuridilla picta | (Verrill, 1901) | Painted elysia |
| Thuridilla lineolata | (Bergh, 1905) | Lined thuridilla |
| Thuridilla livida | (Baba, 1955) | |
| Thuridilla mazda | Ortea & Espinosa, 2000 | |
| Thuridilla neona | Gosliner, 1995 | Neon thuridilla |
| Thuridilla indopacifica | Gosliner, 1995 | |
| Thuridilla hopei | (Vérany, 1853) | |
| Thuridilla hoffae | Gosliner, 1995 | |
| Thuridilla gracilis | (Risbec, 1928) | Bayer's thuridilla |
| Thuridilla flavomaculata | Gosliner, 1995 | |
| Thuridilla carlsoni | Gosliner, 1995 | Sapsucking slug |
| Thuridilla decorata | (Heller & Thompson, 1983) | |
| Thuridilla albopustulosa | Gosliner, 1995 | White spotted thuridilla |
| Thuridilla bayeri | (Marcus, 1965) | |
| Plakobranchus ocellatus | van Hasselt, 1824 | Ringed sap-sucking slug |
| Elysiella pusilla | Bergh, 1872 | Puny Elysiella |
| Elysia zuleicae | Ortea & Espinosa, 2002 | |
| Elysia viridis | (Montagu, 1804) | Green Elysia |
| Elysia virgata | (Bergh, 1888) | |
| Elysia verrucosa | Jensen, 1985 | |
| Elysia velutinus | Pruvot-Fol, 1947 | Sacoglossan sea slug |
| Elysia trisinuata | Baba, 1949 | |
| Elysia translucens | Pruvot-Fol, 1957 | |
| Elysia tomentosa | Jensen, 1997 | Sap sucking slug |
| Elysia timida | (Risso, 1818) | |
| Elysia subornata | Verrill, 1901 | |
| Elysia rufescens | (Pease, 1871) | |
| Elysia scops | Marcus & Marcus, 1967 | |
| Elysia serca | Marcus, 1955 | Seagrass Elysia |
| Elysia ratna | Marcus, 1965 | |
| Elysia rubeni | Martín-Hervás, Carmona, Jensen, Licchelli, Vitale & Cervera, 2020 | |
| Elysia pusilla | Bergh, 1872 | Flat Elysia |
| Elysia purchoni | Thompson, 1977 | |
| Elysia patina | Marcus, 1980 | |
| Elysia papillosa | Verrill, 1901 | Papillose Elysia |
| Elysia patagonica | Muniain & Ortea, 1997 | Green sea slug |
| Elysia ornata | (Swainson, 1840) | Ornate Elysia |
| Elysia obtusa | Baba, 1938 | |
| Elysia nisbeti | Thompson, 1977 | |
| Elysia nigropunctata | (Pease, 1871) | |
| Elysia moebii | (Bergh, 1888) | |
| Elysia nigrocapitata | Baba, 1957 | |
| Elysia mercieri | (Pruvot-Fol, 1930) | |
| Elysia marginata | (Pease, 1871) | |
| Elysia margaritae | Fez, 1962 | |
| Elysia marcusi | (Marcus, 1972) | |
| Elysia maoria | Powell, 1937 | Maori Elysia |
| Elysia japonica | Eliot, 1913 | |
| Elysia leucolegnote | Jensen, 1990 | |
| Elysia hirasei | Baba, 1955 | |
| Elysia hetta | Perrone, 1990 | |
| Elysia hedgpethi | Marcus, 1961 | Hedgpeth's sapsucker |
| Elysia halimedae | Macnae, 1954 | |
| Elysia grandifolia | Kelaart, 1857 | |
| Elysia furvacauda | Burn, 1958 | |
| Elysia gordanae | Thompson & Jaklin, 1988 | |
| Elysia flavomacula | Jensen, 1990 | |
| Elysia flava | Verrill, 1901 | |
| Elysia fezi | Vilella, 1968 | |
| Elysia evelinae | Marcus, 1957 | |
| Elysia diomedea | (Bergh, 1894) | Diomede's sapsucker |
| Elysia degeneri | Ostergaard, 1955 | |
| Elysia crispata | Morch, 1863 | Lettuce seaslug |
| Elysia deborahae | Ortea, Espinosa & Moro, 2005 | |
| Elysia coodgeensis | Angas, 1864 | Coodgee Elysia |
| Elysia chlorotica | Gould, 1870 | Emerald Elysia |
| Elysia cornigera | Nuttall, 1989 | Horned sapsucker |
| Elysia clarki | Pierce et al., 2006 | |
| Elysia chitwa | Marcus, 1955 | |
| Elysia chilkensis | Eliot, 1916 | |
| Elysia catulus | (Gould, 1870) | Eelgrass slug |
| Elysia canguzua | Marcus, 1955 | |
| Elysia australis | (Quoy & Gaimard, 1832) | |
| Elysia annedupontae | Ortea, Espinosa & Caballer, 2005 | |
| Elysia arena | Carlson & Hoff, 1978 | |
| Elysia atroviridis | Baba, 1955 | |
| Bosellia mimetica | Trinchese, 1891 | |
| Bosellia corinneae | Marcus, 1973 |