Generally confined to streams that are tributaries to the Adriatic they are found in northern Italy, Slovenia, Croatia, Montenegro and Bosnia-Herzegovina. Their unusual variegated markings on their dorsal area give them their name. They grow very fast with lengths that vary from 10 up to 25 inches. The largest Marble Trout observed was 46 inches long. These are relatively rare trout due to their rather limited geographical range, and consequently are on the bucket list for many fishermen. Although it can be found in waters from Italy down to the end of Albania, many Slovenians still cherish this beautiful creature as their own trout and trademark of Slovenian fly fishing. This type is olive-brown or olive-green with that special marbled pattern which sometimes goes way down to the belly. The color of the belly is usually yellowish-white or olive. Variability of shadings is incredible! They can be so pale that marbled pattern is hardly seen and on the other hand very dark too. This type has no red spots on the body. Some years back all the fish with marbled pattern with at least one red spot were estimated to be “crossings with brown trout”. Now they seem to be a type of marble trout as well.