Oncorhynchus mykiss (Walbaum, 1792) .

Rainbow Trout or Steelhead. To 122 cm (48 in) TL (Coad 1995). Pacific off Kuril Islands (Kovalenko et al. 2005), Sea of Okhotsk, and Kamchatka to Kuskokwim Bay and Port Moller, south-eastern Bering Sea to northern Baja California near Cuidad Durango (Morrow 1980). Anadromous and freshwater populations. The anadromous form is typically called Steelhead, while freshwater populations are called Rainbow Trout. Parasalmo is used by many European authors. Recently as Salmo gairdnerii (Richardson, 1836) .