Zebrafish reproduce 6-7 times a year. Under normal breeding conditions, they can reproduce once in about 7-10 days. After spawning, after 2-3 days, small fish can hatch, so their breeding cycle is generally about 10 days. Although their breeding cycle is short, it is best for breeders not to let them produce too frequently. Because the frequency of production is too high, it will affect their life and physique, so under normal circumstances, it is best for them to reproduce 6-7 times a year.

1. Choose parent fish: If breeders want zebrafish to reproduce, they should choose several mature parent fish. When selecting, it is best for breeders to look at their appearance, activity and body color.

2, ready to breed: When zebrafish breeds, it needs water temperature between 24-26 ℃, and the PH value should be kept between 6.5-7.5. They should also be installed with a heating rod to keep the water temperature constant, and it is best to install an oxygen pump to keep the dissolved oxygen in the water sufficient.

3. Mating and production: Zebrafish usually lay eggs the next day after entering the tank. When they reproduce, the female fish lay eggs first, and then the male fish inseminate. After fertilization, fish eggs will become fertilized eggs, and at this time they have finished reproduction.

4. Hatching: The fertilized eggs can hatch small fish after 2-3 days. During hatching, the breeder needs to keep the water temperature between 24-28 ℃. The higher the water temperature, the faster the hatching speed, but try not to exceed 28 ℃.