Safe and secure breeding box for small fish that lets you monitor fry easily without risking escape or disturbance. A must-have separating hatchery for pregnant fish, protecting newborns from aggression and improving the survival rate of the newborns. Easy maintenance with a detachable design that is quick to disassemble and clean, and no tools required. Versatile isolation box with a clear panel to prevent fish from jumping out; can be used as a spawning box for viviparous fishes and is especially helpful for aggressive or injured fish. Use scenarios - During breeding of live-bearing species (viviparous) like guppies, mollies, or platies: place the pregnant female in the box so fry are protected after birth. - Quarantine or care: isolate injured or recovering fish while keeping them visible for observation and feeding. - Tank management: separate aggressive tank mates or newly introduced fish to reduce stress and monitor fry growth without removing adults. Notes - Clear panel allows easy observation of fry and behavior. - Detachable design facilitates cleaning and maintenance without tools.