The queen of fast waters...

Salmo trutta - Linné, 1766
Salmonidae Family


Brown trout have elongated bodies, slightly flattened along the flanks. Firm head features with a split mouth. Their jaw contains many teeth directed inwards. The tail fin is most often flat on the end. The body is covered with approximately 120 small scales on the level of the flank line. The skin colour varies siginificantly, depending upon habitat, but also the water streams and shelters. It is most often brownish-yellow on the back, and lighter on the flanks which are covered with red and brown dots.

Habitat and behaviour

Trout can live and spawn only in fresh oxygen rich waters. We find them in the upper parts of large and small rivers. They especially love sheltered parts of the water streams although they do not depart too much from these places, and also the vicinity of weeds, rock shelters and calm hollow banks. They choose big enough locations where they can find shelter and food. As they grow older, their living areas become larger.

Way of feeding

Naturally a predator fish, trout feed on all kinds of invertebrate animals, larvae, shrimp, and soft-bodied insects. As they get older, they feed on minnows, loach, chub and small trout too. But they also gladly consume land prey such as grasshoppers, worms and others..which happen to find themselves in the water.


According to the water temperature and the distance which divides it from the spawning grounds, the trout propagate between November and January. They look for shallow zones in rapids with suitable gravel composed floors. Female browns deposit approximately 2000 eggs per kilogram of her body weight into a spawning bed, which she makes with her tail fin. A brown male fertilizes these eggs before the female covers them with gravel and returns to her usual territory. 40 days later, on the average, the fry come out of the gravel floor and spend their first months of life in the vicinity of the spawning grounds.

Foreign names

Forelle, Bachforelle (German), trotta (Italian), trucha commun (Spanish) truite commune or fario (French), potocna pastrva (Croatian)


Average life span: 5 to 10 years
Average size: 30 to 60 cm
Average weight: 300 g to 7 kg

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