Zebrafish reproduce. They are oviparous fish, and they will reach adulthood about 3-5 months after birth. But it is best to wait until they are 6 months old before breeding, so that they will not only increase the number of reproduction, but also improve the quality of reproduction.

When it comes to breeding season, zebrafish will reproduce as adults. When breeding, male fish will chase female fish. If the female fish has the intention to reproduce, they will chase each other with the male fish. In the process of chasing and playing, the female fish will produce eggs, and the male fish will be inseminated forward. After insemination, fish eggs will become fertilized eggs.

1. Breeding environment: Although zebrafish reproduction is not restricted by seasons, they also have certain requirements for breeding environment. During reproduction, the water temperature should reach above 24 ℃ and the PH value should be kept between 6.5 and 7.5.

2. Mating: Zebrafish belong to oviparous fish, which are fertilized and developed in vitro. During reproduction, female fish produce eggs first, and then male fish come forward to inseminate.

3. Hatching: After the fish eggs become fertilized eggs, they can start hatching. Before hatching, the breeder needs to fish out the unfertilized fish eggs to avoid polluting the water quality. Under normal circumstances, fertilized fish eggs are transparent, while unfertilized fish eggs are white. During the incubation of fertilized eggs, the breeder needs to keep the water temperature at 26 ℃. Wait for 2-3 days, and the small fish can hatch successfully.