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Trout
number of species of freshwater fish / From Wikipedia, the free encyclopedia
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.
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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.