Rainbow Trout Salmo gairdneri Length 30-60cm <br />
The Rainbow Trout is a North American species that is widely introduced and farmed commercially in Britain. Adult has greenish upperparts separated from bluish underparts by a pink band along the flanks; the whole body is covered in small dark spots. Despite its alien status, the Rainbow Trout is now widespread and locally common in rivers, lakes and flooded gravel pits, its spread ensured by continual introductions.