It is a Hatchery for viviparous fish, such as bettas, guppies, medaka, ect. It can Prevent attack from adult fish, improve the survival rate of juvenile fish. The transparent housing ensures that you can check the condition of the fish at any time. The fish breeding tank will not prevent you from watching other fishes as well. The breeding box has a floating design that can be hangs on anywhere with the suction cup. It does not sink and easy to feed and clean. Transparent Cover. Can prevent fish jumping out of the box, and the middle hole is convenient for feeding. The size of the breeding box is 15.5 x 8 x 7.2 cm/6.1 x 3 x 2.8 inch, suitable for aquariums of various sizes;With sucker, anywhere convenient fixed in the tank.