Mexican native trout (in Spanish Truchas Mexicanas)—Mexican rainbow trout, sometimes Baja rainbow trout (Oncorhynchus mykiss nelsoni) and Mexican golden trout (Oncorhynchus chrysogaster) occur in the Pacific ocean tributaries of the Baja California peninsula and in the Sierra Madre Occidental of northwest Mexico as far south as Victoria de Durango in the state of Durango. Many forms of the Mexican rainbow trout (Oncorhynchus mykiss nelsoni and O. m. ssp.), subspecies of the rainbow trout, have been described. The Mexican golden trout (Oncorhynchus chrysogaster) is a recognized species.