10 20 40 60 cm
mittakaava < 40 cm
New York State Department of Environmental Conservation, Lauri Urho, Petri Savola (Uudenmaan ympäristökeskus)
- Other names: Brook char
- Family: Salmonids – Salmonidae
- Similar species: arctic char, lake trout
- Size: 25–40 cm, max. around 1 kg.
- Appearance: Introduced from America, the brook trout greatly resembles Finland’s native Arctic char. Body streamlined, mouth typically large with upper maxilla extending well behind eye.
- Colouring: The brook trout is the most heavily marked of the chars, this providing the most reliable aid to identification. Back olive-green, sides and back have pronounced lighter marbling extending to dorsal and caudal fins. Sides also show red spots with pale bluish halos. Leading edges of pectoral, pelvic and anal fins white.
- Reproduction: Spawns in autumn on gravel bottoms in streamy water. Reproduces successfully in small rivers and streams in several parts of Finland.
- Food: Varied diet ranging from bottom invertebrates to surface insects and small fish. The stomachs of some brook trout caught in Lapland have even been found to contain lemmings and voles.
- Distribution and habitat: Introduced experimentally into Finland over 100 years ago, brook trout have successfully bred in a number of streams and small lakes. Tolerates acidity quite well.
- Harmfulness: Harmful invasive species.