Soča trout is a freshwater fish that lives in river Soča and its tributaries. It is widespread in Adriatic basins. Smaller are staying in medium deeper water, bigger in deep pools.

Part of the Latin name ”marmoratus” refers to characteristic marble pattern on the back of the head. It is recognized by long cylindrical body, that is between 50 and 70 centimeters long and it has marmorial pattern on grey-white background. The pattern can be dark grey, brown, olive green, copper-red or yellow-brown. Among marble pattern there can be few or more red dots or spots. It can reach over 20 kg. Until today, the longest trapped trout in Slovenia had 121 cm and weighted 25 kg.  Male trouts have mandible in shape of a hook.

Trouts are predators. Adult animals feed on fish and hunt in dark, young animals, called “fries” feed with vegetation, plankton and insects. They mate n from November to January on gravelly river bottom.