Essential for pregnant fish, this isolation box protects newborn fry from aggression and helps improve their survival rate. Versatile isolation box with a unique clear C-panel. The design prevents fry from jumping out and can also be used as a spawning box for live-bearing fish. Particularly suitable for aggressive or injured fish. Provides a safe, secure nursery for small fish while keeping baby fry easy to monitor. Space-saving construction: attach to the inside of the aquarium with two suction cups. Floating, double-layer design for compact placement. Use scenarios: - Use as a nursery in a community tank to protect fry from larger tankmates and observe their early development. - Use as quarantine or observation box for new or stressed fish to facilitate monitoring and care. - Use as a spawning or hatch box for live-bearing species to isolate and rear offspring safely.