The Brown Trout is a species of salmonid. Its natural habitat is cold and fresh water. It originally inhabited almost all of Europe and was present in small numbers in Asia. It has, however, been introduced to every continent except Antarctica. The coloring of the Brown Trout varies considerably depending on its surroundings, but in general, it has black and red spots against a yellow-white or yellowish body color. As a predatory fish, it feeds on small water animals, insects, and small fish. Recent years have seen a drastic decline in Brown Trout populations. Causes have been manifold but underline the species’ vulnerability. Conservation of natural and original habitats, along with assistance in natural reproduction of this species could be its only rescue.