gymnopterus, Muraena Bleeker [P.] 1852:52 [Verhandelingen van het Bataviaasch Genootschap van Kunsten en Wetenschappen. v. 25 (art. 5); ref. 339] Jakarta, Java, Indonesia. Holotype (unique): RMNH.PISC.7165 (not BMNH 1867.11.28.301). Described on p. 52 from a single specimen, but on p. 71 Bleeker provided an emended diagnosis under the name Muraenichthijs gijmnopterus [= Muraenichthys gymnopterus] and included a second specimen -- but emendation was in 1874. Holotype changed on 5 Jan. 2016 on Hibino & Kimura 2015:63 [ref. 34120]. •Valid as Muraenichthys gymnopterus (Bleeker 1852) (often seen as 1853) -- (McCosker 1970:508 [ref. 29351], McCosker 1977:59 [ref. 6836], Kuang & Yu in Kuang et al. 1986:31 [ref. 26639], Kuang in Pan et al. 1991:57 [ref. 23876], Kottelat et al. 1993:12 [ref. 23448], Castle & McCosker 1999:121 [ref. 24075], Smith & McCosker 1999:1667 [ref. 24715], Allen & Adrim 2003:24 [ref. 26830], Tang & Zhang 2004:20 [ref. 27889], Kim et al. 2008:319 [ref. 39457], Zhang et al. 2010:318 [ref. 31511], Ji & Kim 2011:66 [ref. 31152], Hibino et al. 2013:[4] [ref. 32505], Kottelat 2013:45 [ref. 32989], McCosker 2014:339 [ref. 33288], Hibino et al. 2015:47 [ref. 34119], Hibino & Kimura 2015:69 [ref. 34120], Ho et al. 2015:168 [ref. 34130], Miesen et al. 2016:81 [ref. 34492], Motomura et al. 2017:31 [ref. 35490], Mohapatra et al. 2019:284 [ref. 36637], Hibino et al. 2019:48 [ref. 37149], Habib & Islam 2020:Supplementary table p. 5 [ref. 38321], Kim et al. 2020:53 [ref. 39118], Ji et al. 2021:245 [ref. 39406], Kunishima et al. 2021:344 [ref. 38768], Mohapatra et al. 2023:5 [ref. 40535]). Current status: Valid as Muraenichthys gymnopterus (Bleeker 1852). Ophichthidae: Myrophinae. Distribution: Eastern Indian Ocean, western Pacific: eastern India east to Philippines and Fji, north to Ryukyu Islands (Japan) and southern Korea. Habitat: freshwater, brackish, marine.