I have 6 cats (I know, I'm nuts) and out the six, three couldn't care less about the tank, two will sit in front of it and watch it, and the other one (my only male-he's a terror) actually stuck his paws down in my freshwater tank and caught a fish. The freshwater tank has since been taken down, but everytime I used to walk into the room where my saltwater tank is, I'd hear a thunk-him jumping down off the glass cover on my tank. So now kitty has to be locked in the laundry room whenever no one is home. But he's a sweetie.
t