Trout is a generic common name for numerous species of carnivorous freshwater fishes belonging to the genera Oncorhynchus, Salmo, and Salvelinus, all of which are members of the subfamily Salmoninae i
Brown trout
Salmo: marble trout, S. marmoratus
Oncorhynchus: rainbow trout, O. mykiss
Salvelinus: brook trout, S. fontinalis
The brown trout is a species of carnivorous ray-finned fish and the most widely distributed species of the salmonid genus Salmo, endemic to most of Europe, West Asia and parts of North Africa, and has
Trout
…There are some anadromous species of trout, such as the steelhead (a coastal subspecies of rainbow trout) and sea trout (the sea-run subspecies of brown trout), that can spend up to three years of their adult lives at sea before returning to freshwater streams for spawning, in the same fashion as a salmon…
A 2.7-kg (6 lb), 60-cm (2 ft) sea trout, from Galway Bay in the west of Ireland bearing scars from a fishing net
Brown trout in Värmland, Sweden, after the first summer