dayi, Hypseleotris Smith [J. L. B.] 1950:707, Fig. 2 [Annals and Magazine of Natural History (Series 12) v. 3 (no. 32) (art. 61); ref. 12976] Estuary of a tributary to St. Lucia Lake, Zululand, KwaZulu-Natal, South Africa. Syntypes: SAIAB [formerly RUSI] 229 (2). •Valid as Hypseleotris dayi Smith 1950 -- (Maugé 1986:395 [ref. 6218], Hoese 1986:810 [ref. 5670], Skelton 1993:362 [ref. 24071]). •Synonym of Hypseleotris cyprinoides (Valenciennes 1837) -- (Thacker & Unmack 2005:2 [ref. 28186], Parenti 2021:47 [ref. 38603], Keith & Mennesson 2023:19 [ref. 40181]). Current status: Synonym of Hypseleotris cyprinoides (Valenciennes 1837). Eleotridae: Eleotrinae. Habitat: freshwater, brackish, marine.