Mickey fish is an adult at 5-6 months after birth, and can give birth to small fish after adulthood. But breeders had better not let the newly developed Mickey fish produce, because they are just adults and their organs are still unstable. If they reproduce immediately, it will not only affect their health, but also affect the quality of their offspring, so it is best for breeders to choose Mickey fish over 6 months old for reproduction. Mickey fish breed without time or season restrictions, as long as they live in the right environment, they will breed.

Mickey fish are oviparous fish, and they reproduce differently from most fish. They are fertilized in vivo. During reproduction, the male fish will try to pair with the female fish. If the pairing is successful, the male fish will insert its genitals into the female fish's drainage hole, thus completing mating. After successful mating, fish eggs will mature in the body before being born. Generally, they are produced about one month after successful mating, so Mickey fish can directly produce small fish.

Although this reproduction method is similar to viviparity, it is not viviparity. Because Mickey fish have no placenta, and small fish only reproduce after developing into new individuals in their mother's body, they do not rely on umbilical cord and placenta, but also their own vitellotin.