Made of high-quality cell cast crystal acrylic Safe and secure for breeding, isolating or acclimating fish Favorable vents allow optimum water flow and easy to observe your baby fish This fish breeder is a hatchery for viviparous fish, such as bettas, guppies, medaka, etc. Provides protection for new born fry from being eaten, improve the survival rate of juvenile fish This fish isolation box can be secured to the aquarium wall with the suction cups