It has since been introduced to many other areas of the world and is recognized by the light-ringed black spots on the brown body. It is widely transplanted because it can thrive in warmer waters than most trout. Ocean-going individuals, called sea trout, are larger than freshwater forms and provide good sport, as do those that enter large lakes. The physiology of this trout species allows it to utilize diverse ecological niches during its life. A brown trout's diet consists of a variety of organisms, and its habitat may vary from small streams, large rivers, or lakes to the ocean.
Brown trout require well-oxygenated, cold water.
The brown trout possesses famed sporting qualities and an excellent taste that ensures their economic importance. European brown trout have been widely introduced and successfully established in suitable waters in Africa, South America, Australia and New Zealand. The economic significance of the trout as sporting fishes and as commercial products is well known. Governments invest heavily to maintain and increase the production of trout and salmon. Due to the importance of the brown trout, it becomes evident why the DEP has chosen to investigate stocking this species in the Park River.