(Latin – Salmo trutta marmoratus)

The marble trout is the emblem of fly fishing in Slovenia. Its populations are very well represented in the rivers of the Adriatic basin. It is the largest species of trout in Slovenia, if not in the world, and is highly esteemed among fly fishermen. The largest specimens of marble trout can grow to over 120 cm and weigh over 20 kg. However, on average, specimens measuring between 40-60 cm are caught. A marble trout measuring over 70 cm is considered a trophy specimen. Due to its marbled pattern, which can vary depending on the river and its habitat, it is a true aquatic stealth predator. Its patterns can vary in colors ranging from yellow-green, brown-green, to gray-blue hues. The size of the marble trout depends on the size of the river in which it lives and the food available to it. Smaller specimens, up to 60 cm in length, are mainly caught on nymphs and smaller streamers. During insect hatches, they can also be effectively caught on dry flies. Larger marble trout are pure predators, lurking in ambush for other smaller fish. They are caught using larger streamers that mimic smaller fish.


In nature, certain trout species can interbreed, leading to the emergence of hybrid trout. In Slovenia, hybrid trout are the result of crossbreeding between marble trout and brown trout. Upon reaching maturity, they often display a blend of characteristics from both parent species, with one genetic lineage usually predominating. This unique blend often results in hybrid trout showcasing stunning variations in appearance.
While hybrid trout typically don’t attain the impressive sizes of pure marble trout, they still grow to commendable dimensions. On average, caught hybrid trout measure between 40 and 55cm, although larger individuals can surpass 90cm. Smaller hybrid trout primarily feed on aquatic insects, while larger specimens tend to be more piscivorous.


(Latin – Salmo trutta fario)

The brown trout is a native species in the Danube basin. Its coloration can adapt to the structure of the riverbed and the colors of the water in which it resides. In waters rich in food, brown trout can attain considerable size and age. While smaller specimens feed on aquatic insects, larger individuals tend to be more piscivorous. The average size of brown trout in Slovenia ranges from 35 to 50 cm. However, trophy specimens can grow to lengths of 80 cm or more.

Rainbow Trout

(Latin – Oncorhynchus mykiss)

The rainbow trout was introduced into our river systems in the past. Thriving in clean and nutrient-rich waters, it swiftly adapted to various conditions. It can be found throughout almost all Slovenian rivers and is renowned for its exceptional fighting spirit. Typically, it grows to sizes ranging between 40-60cm on average. However, larger specimens can exceed 80cm in length and weigh several kilograms.


(Latin – Thymallus thymallus)

Grayling are represented by two species in Slovenia: the Adriatic grayling, which inhabits the Soča River and its tributaries, and the Danube grayling, found in the Sava River and its tributaries. As a fish, they prefer fast-flowing, cold, and oxygen-rich water. They are very sensitive to higher water temperatures, so they are not found in warmer waters. Grayling are highly prized by fly fishermen. The specimens caught here typically measure between 30 and 45 cm, but trophy specimens exceeding the magical size of 50 cm up to 60 cm in length can also be found.

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