Ichthyococcus irregularis Rechnitzer & Böhlke, 1958. Bulldog Lightfish. To 7.6 cm (3 in) SL (Kamikawa 2017). Monterey, central California to Peru (Nakaya et al. 2009), including Islas Galápagos (Rechnitzer and Böhlke 1958). Mesopelagic and bathypelagic (Watson in Moser 1996); depth: 200–3,658 m (656–11,998 ft) (min.: Castellanos-Galindo et al. 2006b; max.: Kamikawa 2017).