Brook Trout was imported into Europe from North America with other fish species at the end of the last century. In the American populations both permanently freshwater as well as migratory forms are known. The brook trout has an olive back with light marbling pattern and the body covered with red, yellow and blue spots. The fins are pale yellow to reddish, whilst the first rays of its pelvic, pectoral and anal fins are white and black. The biology of the brook trout is similar to that of the brown trout and the charr and thus it can easily be crossbred with them. The hybrids are known as zebra-trout, when crossbred with the trout. It will also hybridize with the Arctic charr. The progeny of both crosses are infertile. It habitually spawns during the winter months when the female excavates a suitable spawning be. It has a very similar diet to that of the brown rout and the charr.
Identifying characteristics: Olive-coloured back with light marbling, reel, yellow and blue spots on the sides. Fins pale yellow to reddish; first rays of pectoral, pelvic and anal
Other trout species: Lake Trout