Family grass goldfish reproduce naturally. They are not much different from wild grass goldfish, and their size is not large, so they can reproduce normally in a fish tank with sufficient space. When grass goldfish reach the reproductive age, they will pair and produce. At this time, breeders need to prepare a comfortable environment and sufficient food for them, so as to ensure that they can produce smoothly.

1. Pairing: Mature grass goldfish will start pairing from March to June every year. However, the specific matching time depends on the warming time in various places. When they are paired, the males will keep chasing the females, and when the breeder finds that they are chasing each other, the pairing is successful.

2. Reproduction: Grass goldfish are oviparous fish. When they reproduce, the female fish first produces eggs, and the male fish then excretes sperm. After fish eggs and sperm combine in vitro, they will become fertilized eggs. Generally, female fish start laying eggs between 4 o'clock and 10 o'clock in the morning.

3. Hatching: After the fish eggs become fertilized eggs, the breeder needs to transfer them to a special hatching tank and keep the water temperature between 18-20 ℃. Wait for 3-5 days, and the eggs can hatch into small fish. Small fish can swim and eat in about 3 days, and then they can be fed food.