Trout
number of species of freshwater fish
A trout is a kind of teleost fish that belongs to the Salmoninae subfamily of the Salmonidae family. There are many different kinds of trout. They belong to the same family as the salmon.
![](http://up.wiki.x.io/wikipedia/commons/thumb/d/db/Trout.jpg/220px-Trout.jpg)
![](http://up.wiki.x.io/wikipedia/commons/thumb/d/dc/Biwa_Trout%28Lake_Biwa-JP%29.jpg/220px-Biwa_Trout%28Lake_Biwa-JP%29.jpg)
Most trout are freshwater fish. They live in clear streams, rivers and lakes in America, Europe, and Asia.
It is possible to work out the difference between a trout and any other fish, by looking for a second dorsal fin (or adipose fin). Also, you can find for spots in mature trout and parr marks in the young.