Acanthurus xanthopterus Valenciennes, 1835 .

Purple Surgeonfish, Yellowfin Surgeonfish,or Yellow-masked Surgeon. To 70 cm (27.6 in) TL (Robertson and Allen 2002). Indo-Pacific; western Pacific Ocean north to southern Japan (Shimada in Nakabo 2002); Palos Verdes, southern California (Bill Power, pers. comm. to M.L.); Gulf of California (Krupp in Fischer et al. 1995) to Ecuador (Béarez 1996), including tip of Baja California (Krupp in Fischer et al. 1995), and Islas Galápagos (Grove and Lavenberg 1997). Marine and brackish waters (Koeda et al. 2016); depth: surface (Personal communication: Scripps Institution of Oceanography Fish Collection, La Jolla, California), intertidal to 148 m (3–485 ft) (min.: Arndt and Fricke 2019; max.: Weijerman et al. 2019).