gracilis, Ctenogobius Bleeker [P.] 1875:127 [Archives néerlandaises des sciences exactes et naturelles v. 10; ref. 12599] Singapore. Syntypes: (65) RMNH 6180 (some of 33), ?4508 (7). •Valid as Amoya gracilis (Bleeker 1875) -- (Larson & Williams 1997:367 [ref. 23967], Larson in Randall & Lim 2000:635 [ref. 25122], Hoese & Larson 2006:1623 [ref. 29097], Larson et al. 2013:190 [ref. 32988], Taki et al. 2021:433 [ref. 39830]). •Valid as Acentrogobius gracilis (Bleeker 1875) -- (Allen & Swainston 1988:134 [ref. 25477], Allen 1997:216 [ref. 23977], Hutchins 2001:42 [ref. 25847], Larson & Murdy 2001:3594 [ref. 26293], Larson et al. 2008:145 [ref. 29532], Kottelat 2013:397 [ref. 32989], Parenti 2021:79 [ref. 38603], Sreeraj & Sen 2022:[2] [ref. 38996]). Current status: Valid as Acentrogobius gracilis (Bleeker 1875). Gobiidae: Gobiinae. Distribution: Indo-West Pacific: Sundarbans (India) east to Vietnam, Papua New Guinea, north to South China Sea, south to northern Australia. Habitat: marine.