I have a gold fish and it never moves it is too lazy to eat sometimes. I once wanted to see how it would react to a fly so I took the top off of the tank, cut the hook off of a fly, and set up my rod. With the butt end on the floor then I could cast without hitting the sealing, when I finally managed to cast into the tank the fish didn't even see the fly until it sank and hit it on the nose. Then it almost didn't even strike. This didn't mach the way the fish react when I'm fishing. Maybe if I got a gill from a local lake I would have better luck.