Red zebrafish and blue zebrafish reproduce because they belong to the same species of fish and there is no reproductive isolation. The biggest difference between them is the color of their bodies, so it is ok to breed together.

And now many breeders choose to cross red zebrafish and blue zebrafish together. Some zebrafish will keep blue stripes, but their body color will be reddish. Some will keep red stripes, and the color of their bodies will be slightly blue.

1. Prepare the breeding environment: Zebrafish does not have high requirements on the breeding environment. Breeders only need to ensure that the water temperature is around 26 ℃, the water quality is clean and refreshing, and the surrounding environment is quiet.

2. Choose the right parent fish: If you want zebrafish to reproduce, you should choose mature parent fish. When choosing parent fish, it is best to choose some with bright body color and high activity, so that the quality of reproduction can become higher.

3. Mating: Zebrafish is oviparous and fertilized in vitro. When breeding, the male fish will keep chasing the female fish, and then the female fish will lay eggs in the process of chasing. After the female fish lays eggs, the male fish will immediately come forward to inseminate, and the eggs will become fertilized eggs.

4. Hatching: Fertilized eggs can hatch small fish after 2-3 days in water temperature of about 26 ℃. During hatching, breeders need to keep the water temperature constant and try not to change water. After the small fish hatch, a small amount of water can be changed.