goldfish do not give birth to small fish directly, because they are oviparous fish, and the way of reproduction is in vitro fertilization and in vitro development. Even if they can produce, they produce fish eggs, not small fish. If the breeder finds small fish in the fish tank, it may be produced by other fish, or it may be that goldfish hatched successfully after production. Because they don't have high requirements for reproduction, they can reproduce normally as long as the environment is comfortable. In addition, they hatch quickly, so they can hatch successfully soon.

1. Pairing: After goldfish develop into adults, they will start estrus every spring. After goldfish are in heat, they will pair themselves. As long as the pair is successful, they will start to breed.

2. Reproduction: Goldfish are oviparous fish. When they reproduce, the female fish will produce eggs first, and after the female fish produces, the male fish will immediately come forward to inseminate. When fish eggs are inseminated, they become fertilized eggs.

3. Hatching: The breeder needs to fish the eggs out and put them in a separate tank to hatch. And install a heating rod to keep the water temperature in a stable range. During hatching, breeders should try not to change water or fluctuate too much. In about a week or so, fish eggs can hatch small fish. Small fish don't need to be fed in the first 3 days of birth. After they can move freely, try to feed food.