gymnocephalus, Gobius Bleeker [P.] 1853:473 [Natuurkundig Tijdschrift voor Nederlandsch Indië v. 4 (no. 3); ref. 336] East Indies (no specific locality). Syntypes: (2) RMNH 4536 (1 or 2 of 7, including the smallest). Kottelat (2013) cites a freshwater record. •Valid as Cryptocentrus gymnocephalus (Bleeker 1853) -- (Talwar & Jhingran 1991:933 [ref. 20764]). •Valid as Amblyeleotris gymnocephala (Bleeker 1853) -- (Hoese & Steene 1978:382 [ref. 8713], Randall et al. 1997:525 [ref. 25919], Myers 1999:238 [ref. 23965], Mohlmann & Munday 1999:62 [ref. 24273], Aonuma et al. 2000:117 [ref. 24522], Larson in Randall & Lim 2000:635 [ref. 25122], Sadovy & Cornish 2000:240 [ref. 25480], Allen 2000:118 [ref. 25868], Hutchins 2001:42 [ref. 25847], Larson & Murdy 2001:3594 [ref. 26293], Allen & Adrim 2003:56 [ref. 26830], Randall et al. 2005:127 [ref. 28745], Chen et al. 2006:2564 [ref. 29024], Larson et al. 2008:146 [ref. 29532], Allen & Erdmann 2012:863 [ref. 31980], Larson et al. 2013:189 [ref. 32988], Fricke et al. 2014:157 [ref. 33932], Prokofiev 2016:369 [ref. 34506], Shibukawa in Kimura et al. 2018:255 [ref. 36460], Fricke et al. 2019:269 [ref. 36673], Parenti 2021:84 [ref. 38603], Endruweit 2024:75 [ref. 41040]). Current status: Valid as Amblyeleotris gymnocephala (Bleeker 1853). Gobiidae: Gobiinae. Distribution: Eastern Indian Ocean, western Pacific: Indonesia east to Marshall Islands and New Ireland (Papua New Guinea), north to northern Vietnam, south to northern Australia. Habitat: brackish, marine.