How do zebrafish fertilize after laying eggs and hatch after fertilization

After the zebrafish spawns, the male fish will discharge sperm in the center of the eggs, and the eggs and sperm will combine themselves and then become fertilized eggs. At this time, they are considered to have finished reproduction. After 2-3 days, fertilized eggs can hatch small fish. When zebrafish breed, breeders need to lay a layer of pebbles or nylon mesh on the bottom of the fish tank, so that the eggs can be better attached to it and the parent fish can avoid eating the eggs.

1. How to fertilize zebrafish after spawning

After spawning zebrafish, male fish will fertilize their eggs by themselves. When they reproduce, female fish will first produce eggs, and then male fish will discharge sperm. Fish eggs and sperm will combine by themselves. When sperm and fish eggs combine successfully, reproduction is completed. After successful fertilization of fish eggs, small fish can hatch in 2-3 days.

When zebrafish breed, it is best for breeders to prepare a nylon net plate for them or lay a layer of pebbles on the bottom of the fish tank. In this way, fish eggs can also be attached, and parent fish can be prevented from eating fish eggs.

2. How to hatch zebrafish eggs after fertilization

1. Keep the water temperature: After successful fertilization of zebrafish eggs, breeders need to keep the water temperature between 24-28 ℃. After 1-3 days, fish eggs can hatch successfully. But the specific incubation time depends on the feeding temperature. If the breeder keeps the water temperature at 24 ℃, it usually takes 2-3 days for the eggs to hatch successfully. If the breeder can keep the water temperature at 28 ℃, it only takes 1-2 days for them to hatch successfully. Breeders can install a heating rod to keep the water temperature constant.

2. Keep enough oxygen: The breeder should also install an oxygen pump to ensure that the eggs have enough oxygen. Because fish eggs also need more oxygen to hatch better.