nigromarginatus, Opistognathus Rüppell [W. P. E. S.] 1830:114, Pl. 28 (fig. 4) [Atlas zu der Reise im nördlichen Africa. Fische des Rothen Meeres; ref. 3843] Massawa, Eritrea, Red Sea. Lectotype: SMF 591. Paralectotypes: SMF 12489 [not 12948] (2). Lectotype established by Dor 1984:219 [ref. 29757], but established earlier by Smith-Vaniz 1983 [ref. 8211]. •Valid as Opistognathus nigromarginatus Rüppell 1830 -- (Smith-Vaniz 1983:6 [ref. 8211], Dor 1984:219 [ref. 29757], Smith-Vaniz 1986:727 [ref. 5718], Randall et al. 1994:236 [ref. 21645], Goren & Dor 1994:57 [ref. 25356], Randall 1995:302 [ref. 22896], Carpenter et al. 1997:206 [ref. 23922], Smith-Vaniz 1999:2589 [ref. 24833], Smith-Vaniz in Randall & Lim 2000:612 [ref. 25122], Manilo & Bogorodsky 2003:S105 [ref. 27377], Mishra & Krishnan 2003:41 [ref. 27712], Heemstra & Heemstra 2004:376 [ref. 28072], Smith-Vaniz 2009:85 [ref. 30149], Motomura in Motomura & Satapoomin 2009:99 [ref. 30492], Smith-Vaniz 2010:39, 42 [ref. 30922], Smith-Vaniz 2011:38 [ref. 31597], Allen & Erdmann 2012:353 [ref. 31980], Smith-Vaniz et al. 2012:20 [ref. 32262], Biswas et al. 2013:1 [ref. 32524], Golani & Fricke 2018:133 [ref. 36273], Eagderi et al. 2019:92 [ref. 37020], Jaafar et al. 2019:884 [ref. 37007], Shinohara 2021:165 [ref. 38285], Smith-Vaniz 2022:313 [ref. 39947], Smith-Vaniz 2023:79 [ref. 40049], Allen & Erdmann 2024:379 [ref. 40796]). Current status: Valid as Opistognathus nigromarginatus Rüppell 1830. Opistognathidae. Distribution: Red Sea; Indo-West Pacific: KwaZulu-Natal (South Africa), East Africa, Persian Gulf and Aldabra (Seychelles) east to Malaysia, Thailand and South China Sea (Vietnam). Habitat: marine.