Aplysia is een geslacht van slakken uit de familie van de Aplysiidae.

Soorten 
 Aplysia argus Rüppell & Leuckart, 1830
 Aplysia atromarginata Bergh, 1905
 Aplysia brasiliana Rang, 1828
 Aplysia californica (James Graham Cooper, 1863) (Californische zeehaas)
 Aplysia cedrosensis Bartsch & Rehder, 1939
 Aplysia cervina (Dall & Simpson, 1901)
 Aplysia cornigera Sowerby, 1869
 Aplysia cronullae Eales, 1960
 Aplysia dactylomela Rang, 1828
 Aplysia depilans Gmelin, 1791
 Aplysia dura Eales, 1960
 Aplysia elongata (Pease, 1860)
 Aplysia euchlora A. Adams, 1861
 Aplysia extraordinaria (Allan, 1932)
 Aplysia fasciata Poiret, 1789
 Aplysia ghanimii Golestani, Crocetta, Padula, Camacho, Langeneck, Poursanidis, Pola, Yokeş, Cervera, Jung, Gosliner, Araya, Hooker, Schrödl & Valdés, 2019
 Aplysia gigantea Sowerby, 1869
 Aplysia hooveri Golestani, Crocetta, Padula, Camacho, Langeneck, Poursanidis, Pola, Yokeş, Cervera, Jung, Gosliner, Araya, Hooker, Schrödl & Valdés, 2019
 Aplysia inca d'Orbigny, 1837
 Aplysia japonica G. B. Sowerby II, 1869
 Aplysia juanina (Bergh, 1898)
 Aplysia juliana Quoy & Gaimard, 1832
 Aplysia keraudreni Rang, 1828
 Aplysia kurodai Baba, 1937
 Aplysia maculata Rang, 1828
 Aplysia morio (A. E. Verrill, 1901)
 Aplysia nigra d'Orbigny, 1837
 Aplysia nigrocincta von Martens, 1880
 Aplysia oculifera A. Adams & Reeve, 1850
 Aplysia parva Pruvot-Fol, 1953
 Aplysia parvula Mörch, 1863
 Aplysia perviridis (Pilsbry, 1895)
 Aplysia pilsbryi (Letson, 1898)
 Aplysia pulmonica Gould, 1852
 Aplysia punctata (Cuvier, 1803) (Gestippelde zeehaas)
 Aplysia rehderi Eales, 1960
 Aplysia reticulata Eales, 1960
 Aplysia reticulopoda Beeman, 1960
 Aplysia robertsi (Pilsbry, 1895)
 Aplysia rudmani Bebbington, 1974
 Aplysia sagamiana Baba, 1949
 Aplysia sowerbyi Pilsbry, 1895
 Aplysia sydneyensis Sowerby, 1869
 Aplysia tanzanensis Bebbington, 1974
 Aplysia vaccaria Winkler, 1955
 Aplysia vistosa Pruvot-Fol, 1953

Aplysiidae