Zebrafish begin to breed in May every year under normal breeding conditions, and the water temperature should reach above 24 ℃ when they breed. Their reproduction is not restricted by seasons, and if the water temperature can be kept above 24 ℃ in winter, they may also reproduce. The number and frequency of zebrafish reproduction are relatively high. If they live in a comfortable environment, they can reproduce once every 7 days and reproduce 6-7 times continuously. If breeders want them to breed in large numbers, they'd better ensure that their living environment is comfortable.

1. Prepare breeding environment: When zebrafish breeds, it is necessary to keep the water temperature above 24 ℃ and the water quality clean and refreshing. When they breed, it is best not to change water. In addition, when breeding, breeders should also ensure that the surrounding environment is quiet, so as not to make them frightened by too much noise.

2. Choose parent fish: If breeders want zebrafish to breed, they must choose mature parent fish. When choosing parent fish, it is best to observe the body color and activity. It is best to choose some parent fish with bright body color and lively activity.

3. Breeding: After the parent fish enters the breeding tank, they will mate. During mating, the male fish will constantly chase the female fish, and the female fish will lay eggs in the process of chasing the male fish, and the male fish will discharge sperm beside the eggs. At this time, fish eggs will become fertilized eggs.

4. Hatching: Zebrafish eggs can hatch in the water temperature between 24-26 ℃ for about 2-3 days, and the breeder should keep the water temperature constant during hatching. Attention should also be paid not to change water, so as to avoid too much fluctuation of water quality affecting their growth and development.