Alfie Pet by Petoga Couture - Comi Hang-on Nursery Fish Tank with Isolation Breeding Hatchery This nursery fish case measures: 8" long; 4" wide and 4" high. Ideal as maturation tank for fry, or isolation tank for aggressive or injured fish. Removable center divider allows two fish to be safely isolated. Space saving design that hangs on the inside of the aquarium. Please remove the protection film before use.