Cratena

Cratena is a genus of sea slugs, aeolid nudibranchs, marine gastropod molluscs in the family Facelinidae.

Cratena is the type genus of the subfamily Crateninae.

Species
Species within the genus Cratena include:
 * Cratena affinis (Baba, 1949)
 * Cratena capensis Barnard, 1927 - orange-eyed nudibranch
 * Cratena lineata Eliot, 1905
 * Cratena minor Padula, Araújo, Matthews-Cascon & Schrödl, 2014
 * Cratena pawarshindeorum Bharate, Padula, Apte & Shimpi, 2020
 * Cratena peregrina (Gmelin, 1791)
 * Cratena pilata (Gould, 1870)
 * Cratena poshitraensis Bharate, Padula, Apte & Shimpi, 2020
 * Cratena scintilla Ortea & Moro, 1998
 * Cratena simba Edmunds, 1970
 * Cratena tema Edmunds, 2015
 * Taxa inquirenda:
 * Cratena cornuta (Risbec, 1928)
 * Cratena diffusa (Risbec, 1928)
 * Cratena grisea (Risbec, 1928)
 * Species brought into synonymy:
 * Cratena anulata Baba, 1949 : synonym of Cuthona anulata (Baba, 1949)
 * Cratena cavanca Bergh, 1898 : synonym of Phidiana lottini (Lesson, 1831)
 * Cratena exigua Thiele, 1912 : synonym of Cuthona georgiana (Pfeffer in Martens & Pfeffer, 1886)
 * Cratena fructuosa Bergh, 1892 : synonym of Cuthona fructuosa (Bergh, 1892)
 * Cratena genovae O'Donoghue, 1929 : synonym of Cuthona genovae (O'Donoghue, 1929)
 * Cratena gymnota (Couthouy, 1838) : synonym of Cuthona gymnota (Couthouy, 1838)
 * Cratena hirsuta Bergh, 1864 : synonym of Cuthona nana (Alder & Hancock, 1842)
 * Cratena kaoruae Marcus, 1957 : synonym of Cratena pilata (Gould, 1870)
 * Cratena lugubris Bergh, 1870 : synonym of Phestilla lugubris (Bergh, 1870)
 * Cratena macphersonae Burn, 1962 : synonym of Phyllodesmium macphersonae (Burn, 1962)
 * Cratena nigricolora Baba, 1955 : synonym of Catriona nigricolora (Baba, 1955)
 * Cratena pinnifera Baba, 1949 : synonym of Catriona pinnifera (Baba, 1949)
 * Cratena piutaensis Ortea, Caballer & Espinosa, 2003 : synonym of Anetarca piutaensis (Ortea, Caballer & Espinosa, 2003)
 * Cratena puellula Baba, 1955 : synonym of Cuthona puellula (Baba, 1955)
 * Cratena pusilla Bergh, 1898 : synonym of Cuthona pusilla (Bergh, 1898)
 * Cratena valentini Eliot, 1907 : synonym of Cuthona valentini (Eliot, 1907)
 * Cratena venusta Baba, 1949 : synonym of Catriona venusta (Baba, 1949)
 * Cratena veronicae A. E. Verrill, 1880 : synonym of Cuthona veronicae (A. E. Verrill, 1880)
 * Cratena vittata (Alder & Hancock, 1842) : synonym of Eubranchus vittatus (Alder & Hancock, 1842)
 * Cratena yatsui Baba, 1930 : synonym of Herviella yatsui (Baba, 1930)