Prized and wary European game fish ( Salmo trutta, family Salmonidae) that is favoured for food.
The species includes several varieties (e.g., the Loch Leven trout of Britain). The brown trout is recognized by the light-ringed black spots on its brown body. It has been transplanted to many areas of the world because it can thrive in warmer waters than most other trout . It grows to about 8 lbs (3.6 kg). Oceangoing individuals, called sea trout, are larger than freshwater forms and provide good sport, as do those that enter large lakes.
Brown trout ( Salmo trutta )
Treat Davidson
The National Audubon Society Collection/Photo Researchers