My kitten seems interested in my fish tank...it has a lid but it has a corner cut off so i can feed the fish without taking the lid off. My kitten jumps up there and puts it's paw down into the tank through the hole. The fish swim up to her. I think they think that I'm feeding them. I'm afraid that one day she will catch one. How can I stop this?

sorry couldnt resist ,i breed birds as well as keeping fish and im not a cat lover ,i dont mind em as long as they stay away ,i use ultrasonic deterents in the garden for cats and other 4 legged nastys at £200 for the fish and £300 worth of birds i aint feeding pussy