fischeri, Acerina Eichwald [C. E. von] 1873:15, Pl. 2 [Archives de zoologie expérimentale et générale (Paris) v. 2; ref. 20999] Lakes of the Tomsk Province, Russia. No types known. •Synonym of Acerina cernua (Linnaeus 1758) -- (Berg 1949:1046 [ref. 20662]). •Synonym of Gymnocephalus cernuus (Linnaeus 1758) -- (Kottelat 1997:172 [ref. 22952]). Current status: Synonym of Gymnocephalus cernua (Linnaeus 1758). Percidae: Percinae. Habitat: freshwater, brackish.