Brown Trout
Salmo trutta
The brown trout is an originally European species of salmonid fish. It includes both purely freshwater populations, referred to "Salmo trutta" morpha "fario" and "S. trutta" morpha "lacustris", and anadromous forms known as the sea trout, "S. trutta" morpha "trutta". The latter migrates to the oceans for much of its life and returns to freshwater only to spawn.