The brown trout or salmo trutta
Author Knepp Timothy, U.S. Fish and Wildlife Service
Source: https://commons.wikimedia.org/wiki/File:Brown_trout_Salmo_trutta.jpg

The brown trout (Salmo trutta) is a European species of salmonid fish (Salmonidae) that has been widely introduced into suitable environments globally. The native range of brown trouts extends from northern Norway and White Sea tributaries in Russia in the Arctic Ocean to the Atlas Mountains in North Africa. The western limit of Salmo trutta is Iceland in the north Atlantic, while the eastern limit is in Aral Sea tributaries in Afghanistan and Pakistan.

Order: Salmoniformes
Family: Salmonidae
Genus: Salmo
Species: Salmo trutta Linnaeus, 1758