formosus, Gymnothorax Bleeker [P.] 1864:51 [Nederlandsch Tijdschrift voor de Dierkunde v. 2; ref. 408] Wahai, Ceram, Indonesia. Holotype (unique): BMNH 1867.11.28.241. Type catalog: Böhlke & Smith 2002:112 [ref. 26380]. Takes precedence over Gymnothorax rhodocephalus Bleeker 1856 -- see Böhlke & Smith 2002:112 [ref. 26380]. •Synonym of Gymnothorax undulatus Bleeker 1864 -- (Alllen & Erdmann 2012:95 [ref. 31980]). •Valid as Gymnothorax formosus Bleeker 1864 -- (Böhlke et al. 1999:1656 [ref. 24692], Randall et al. 2002:154 [ref. 26192], Böhlke & Smith 2002:112 [ref. 26380], Allen & Adrim 2003:23 [ref. 26830], Smith 2012:16 [ref. 32155], Delrieu-Trottin et al. 2015:4 [ref. 33988], Ho et al. 2015:156 [ref. 34130], Ramos-Castro et al. 2020:83 [ref. 37651]). Current status: Valid as Gymnothorax formosus Bleeker 1864. Muraenidae: Muraeninae. Distribution: Western and central Pacific. Habitat: marine.