Chaetodon humeralis Günther, 1860 .

Threebanded Butterflyfish. To 26.4 cm (10.6 in) TL (Amezcua Linares 1996). King Harbor, southern California (Pondella et al. 1998) to Chile (Pequeño 1989), including Islas Galápagos (Miller and Lea 1972), and Gulf of California (Galván-Magaña et al. 1996); one Hawaiian record (Fricke et al. 2020). Marine and occasionally brackish waters (Romero-Berny et al. 2021); depth: surface (nightlight; Personal communication: Scripps Institution of Oceanography Fish Collection, La Jolla, California), intertidal to 107 m (351 ft) (minimum: Castellanos-Galindo et al. 2014; max.: Amezcua Linares 1996).