Trout is a trout. It is a kind of valuable fishing fish and edible fish, and there are about 10 species in the world. Trout is the common name of a group of fish belonging to salmonidae and salmoninae. All the fish called trout are members of Salmoninae.

Freshwater fish. It belongs to the genus Salmon of Salmonidae. There are about six or seven species in the world, among which three species, namely rainbow trout, broken throat trout and Atlantic salmon, are native to Canada; Two other species, brown trout and golden trout, have also been introduced to Canada. Different from other salmon, trout has black spots on its head and body, and 7 ~12 fin spines on its tail fin.

Extended data:

Trout is one of the most difficult fish to classify because of its irregular physiological structure and great differences in body color and habits. Coupled with artificial breeding and hybridization and the introduction of exotic species, the classification of trout is more complicated. Several trout originally classified as spotted trout are now generally considered as salmon.

Brown trout is the only trout classified as spotted trout at present, and it is also an endangered animal among trout. The trout of the genus Salmo includes stream trout, lake trout and sea trout, and the genus Salmon includes rainbow trout, mountain trout and golden trout. Golden trout is a kind of trout that is not necessarily beautiful in color. It is native to the clear rivers in the mountainous areas of western North America.

European sea trout, originally a common trout in Europe, has been widely introduced to the waters suitable for their growth all over the world. Because trout is an ideal fishing and food fish for many people, it is caught in large quantities all over the world every year. Therefore, the number of most wild mountain trout, mountain trout and other trout in the world has dropped sharply and is in an endangered state.