Marble trout (Salmo marmoratus) is a species freshwater fish in the Salmonidae family. It is characterized by distinctive marbled color pattern and high growth capacity. The marble trout is found in only three basins and two rivers of the Adriatic basin, namely the Po with only northern/left tributaries and the Adige, Brenta, Piave, Tagliamento and Livenza basins in Italy, the Soča basin in Slovenia and Italy, the Neretva river in Bosnia and Herzegovina and Croatia, and the Morača river in Montenegro. While once present in the Drin river basin in Albania fish is almost certainly extirpated there.