Salmo Gairdneri is one of the scientific names for the rainbow trout. There are several synonyms for this species, including Oncorhynchus mykiss, Salmo iridea, and Salmo henshawi. These names refer to the same species of freshwater fish that is native to North America, particularly in watersheds of the Pacific coast. Rainbow trout are popular among anglers for their aggressive behavior and hard-fighting nature. They are also raised in fish farms and stocked in lakes and rivers for recreational fishing. In addition to their sporting value, rainbow trout are an important food source for humans and wildlife.