opalescens, Ctenogobius Herre [A. W. C. T.] 1936:15, Pl. 11 [Bulletin of the Raffles Museum No. 12; ref. 10994] Singapore. Holotype: CAS-SU 30956. Paratypes: (34) BMNH 1937.9.22.2-4 (3?) from Herre, FMNH 47008 (3), CAS-SU 16966 (24). Type catalog: Koumans 1940:152 [ref. 2676], Böhlke 1953:111 [ref. 12291], Ibarra & Stewart 1987:29 [ref. 12367]. •Valid as Favonigobius opalescens (Herre 1936) -- (Larson in Randall & Lim 2000:637 [ref. 25122], Larson & Murdy 2001:3597 [ref. 26293], Shibukawa et al. in Kimura & Matsuura 2003:183 [ref. 27510], Larson et al. 2008:148 [ref. 29532], Prokofiev 2016:646 [ref. 35020], Parenti 2021:155 [ref. 38603]). Current status: Valid as Favonigobius opalescens (Herre 1936). Gobiidae: Gobiinae. Distribution: Eastern Indian Ocean: Singapore. Habitat: marine.