Cat Proof Fish Aquarium. Cats hate water and will most likely runoff. However this also means you cat will enjoy easier access to those colorful tasty-looking fish presenting you with a problem.

Cover within the aquarium or fish tank. Fish jump you know. This way any cat attempting to jump atop the aquariumIn would simply slide off with no places to cling onto.
I have had quite a few aquariums and different cats along with them and never has a cat proved a problem.
Deter the cat by applying. Aqueon Aquarium AAG29024 Versa Top 24-Inch. I guess then you gotta figure out a way to fish proof your cat. A little time and creativity is all it takes to keep your fish safe and your cat dry.