They are territorial and as they grow they start feeding on fish. As every decent predator this fish has also very sharp teeth. All that makes flyfishing for big marbles very difficult considering use of barbless hooks and flies that can reach them. Getting deep enough in fast water is not very easy as we all know and tackle must be strong enough too. So at least fish under the size limit must be released.
Sharp teeth make the prey travel only one way.
Marble trout has recently become interesting trademark of Slovenian flyfishing. Due to the work of devoted domestic and some foreign scientists from different parts of Europe, especially from France, it seems it will remain in our streams and keep bringing flyfishermen from all over the world to our small and beautiful country. The pleasure of anticipation . . . The Bank Manager's Fish Catch and Release .