crassus, Opistognathus Smith-Vaniz [W. F.] 2010:47, Figs. 2C, 11-13 [Smithiana, Publications in Aquatic Biodiversity, Bulletin No. 12; ref. 30922] Ari Atoll, reef north of Bathala Islands, Maldive Islands, depth 35 meters. Holotype (unique): BPBM 32706. •Valid as Opistognathus crassus Smith-Vaniz 2010 -- (Hiramatsu & Endo 2013:22 [ref. 32573], Smith-Vaniz 2022:311 [ref. 39947], Smith-Vaniz 2023:46 [ref. 40049]). Current status: Valid as Opistognathus crassus Smith-Vaniz 2010. Opistognathidae. Distribution: Western Indian Ocean: Maldives. Habitat: marine.