The Marina 2-in-1 Fish Hatchery is ideal to breed and raise fish in community aquariums. You first place your pregnant fish on the inside, where the slotted bottom partition will allow newly-born fry to fall through and away from mother to the safety of the bottom chamber. By placing in the center divider, two pregnant fish can be kept at once. The Marina 2-in-1 can also double as a safe-house for wounded fish or to segregate aggressive fish. It is the perfect way to get your school of fish growing!