japonica, Kopua Moore [G. I.], Hutchins [J. B.] & Okamoto [M.] 2012:35, Figs. 1-3 [Zootaxa No. 3380; ref. 32042] East China Sea, 30°06'N, 127°39'E, depth 225-228 meters. Holotype (unique): NSMT-P 106831. •Valid as Kopua japonica Moore, Hutchins & Okamoto 2012 -- (Okamoto & Todate 2014:179 [ref. 33658], Shinohara & Katayama 2015:436 [6] [ref. 33677], Fujiwara et al. 2018:[2] [ref. 35951]). •Synonym of Kopua minima (Döderlein 1887) -- (Fujiwara & Motomura 2019:66 [ref. 36982]). Current status: Synonym of Kopua minima (Döderlein 1887). Gobiesocidae: Protogobiesocinae. Habitat: marine.