ZippyPaws Aquarium Burrow Toy with 3 Fish, Plus 3 Extra Fish Refills ZippyPaws Aquarium Burrow Toy with 3 Fish, Plus 3 Extra Fish Refills Interactive puzzle toy challenges your dog Keeps your dog entertained and occuplied Aquarium size: 7 x 5 x 5.5 inch Great for small and medium-sized dogs