flavimanus, Gobius Temminck [C. J.] & Schlegel [H.] 1845:141, Pl. 74 (fig. 1) [Fauna Japonica Parts 7-9; ref. 4373] River mouths of Nagasaki Bay, Japan. Lectotype: RMNH 1905a. Paralectotypes: RMNH 1905b (1), 1906-1907 (1, 15). Lectotype selected by Boeseman 1947:121 [ref. 12876]; see also other specimens discussed by Boeseman 1947:121 [ref. 12876]. •Synonym of Gymnogobius macrognathos (Bleeker 1860) -- (Berg 1949:1073 [ref. 20662] as macrognathus). •Valid as Acentrogobius flavimanus (Temminck & Schlegel 1845) -- (Berg 1949:1076 [ref. 20662]). •Valid as Acanthogobius flavimanus (Temminck & Schlegel 1845) -- (Okada 1961:671 [ref. 6363], Lindberg & Krasyukova 1975:367 [ref. 7348], Lee et al. 1980:785 [ref. 22416], Eschmeyer & Herald 1983:261 [ref. 9277], Akihito in Masuda et al. 1984:278 [ref. 6441], Kawanabe & Mizuno 1989:624 [ref. 25598], Gomon et al. 1994:782 [ref. 22532], Takahashi 1996:2 [ref. 24363], Cheng & Zhou 1997:384 [ref. 26385], Kim 1997:438 [ref. 24032], Takahashi et al. 1997:48 [ref. 24971], Reshetnikov et al. 1997:752 [ref. 24702], Kuiter 1997:354 [ref. 25488], Vasil'eva 1998:125 [ref. 23591], Sokolovskaya et al. 1998:13 [ref. 24670], Sato et al. 1998:41 [ref. 24972], Mizuno et al. 1999:11 [ref. 25311], Fuller et al. 1999:458 [ref. 25838], Larson in Randall & Lim 2000:635 [ref. 25122], Nakabo 2000:1207 [ref. 25182], Lee 2001:50 [ref. 25335], Pietsch et al. 2001:145 [ref. 25688], Sakai et al. 2001:108 [ref. 25693], Bogutskaya et al. 2001:47 [ref. 26178], Wang et al. 2001:267 [ref. 26566], Kim & Park 2002:361 [ref. 25913], Nakabo 2002:1207 [ref. 26193], Choi et al. 2003:398, 656 [ref. 26218], Moyle 2002:436 [ref. 26449], Yonezawa & Shinomiya 2002:2 [ref. 26563], Hagiwara 2003:38 [ref. 27188], Vasil'eva 2003:S41 [ref. 28444], Nelson et al. 2004:169 [ref. 27807], Bogutskaya & Naseka 2004:214 [ref. 28183], Love et al. 2005:160 [ref. 37547], Hoese & Larson 2006:1616 [ref. 29097], Hoese & Larson 2008:750 [ref. 30660], Page & Burr 2011:618 [ref. 31215], Larson 2011:237 [ref. 31740], Shibukawa & Iwata 2013:47 [ref. 32580], Page et al. 2013:174 [ref. 32708], Matsui et al. 2014:6 [ref. 33344], Parin et al. 2015:474 [ref. 33547], Kells et al. 2016:304 [ref. 35888], Kuiter 2018:104 [ref. 36369], Burton & Lea 2019:90 [ref. 37205], Kim et al. 2020:169 [ref. 39118], Sonoyama et al. 2020:102 [ref. 37637], Love et al. 2021:203 [ref. 39279], Parenti 2021:285 [ref. 38603], Page et al. 2023:120 [ref. 40505], Thu & Thao 2023:642 [ref. 40499]). Current status: Valid as Acanthogobius flavimanus (Temminck & Schlegel 1845). Oxudercidae: Gobionellinae. Distribution: Northwestern Pacific: Japan, Korea, China and Russia. Introduced (invasive) elsewhere, including bays in California (U.S.A.). Habitat: freshwater, brackish, marine.