One upon a time I put a quarter size snapping turtle in an aquarium, which had some squiffy little scavenger fish and a pleco... in the year that it took to outgrow the aquarium becoming about a foot long, it never bothered a single fish.
I dare say it would have scoffed a dead one floating around, it sure had an aggressive appetite, it seems active perky fish just dont interest a turtle, being faster and more maneuverable, in water
Snapping turtles are quite shy critters, moving very slow and deliberatel a lot of the time, the only damage I'd expect from them is if they found a tasty crate of water lilies to chobble on
You could try spotting where the turtle is, and getting in the habit of dropping a tasty morsel in a regular place so it becomes docile to your visits... as you throw a few chicken tid bits in, see if it pays any attention to the fish that that come along to snatch a snack... I'll bet the turtle quite often looks pathetic, as fish dash off with his morsels...
Regards, Andy
