The BOYU Aquarium Fish Breeder Box Isolation Box is a modern and stylish way to keep your fish healthy and safe. Made of durable plastic, it is easy to clean and provides excellent isolation between fish. The mesh design allows for optimal water flow, and the included suction cups make it easy to attach to the top of your aquarium. The box can be used as the spawning box for the viviparous fishes, and it easily isolates injured or aggressive fish. It also safely separates new-born fry from other fish, improving the survival rate of juvenile fish.