【Perfect Size】The size of fish hatchery is 10.62"x3.54"x4.13"/27x9x10.5cm.This fish breeder box is a Hatchery for viviparous fish, such as bettas, guppies, medaka, ect, 0.5mm Super-slim Isolation Gap Thinner than the gap of the fish eggs plate, effectively protect the baby fish from the invasion of the adult fish,can protect new born fry from being eaten, improve the survival rate of juvenile fish. 【Safe Upgraded Design】PINVNBY aquarium breeding box is made of transparent acrylic, safe and secure tank for breeding, isolating or acclimating fish. You can clearly observe inside condition. Exquisite workmanship, Safe and secure for breeding, isolating or acclimating fish, favorable vents allow optimum water flow and easy to observe your baby fish. 【Protect Juvenile Fish】Prevent the baby fish from the adult fish's attack and improve the survival rate of the baby fish. This breeder box for fish tank comes with self-contained isolation plate, can reduce danger from aggressive fishes, protect injured fish, small fish, shrimp, and other sea clownfish.