Many families will raise some animals and plants, which can not only kill their spare time, but also cultivate some hobbies. It is a very pleasant thing. Raising goldfish is also the preferred goal of many families. When raising goldfish, there will be problems of offspring. For example, what color of goldfish eggs will hatch is a matter of concern. Understanding the relevant knowledge is also the key method to take good care of goldfish. The fertilized goldfish eggs are orange yellow and translucent, and their body size is particularly small, while the milky white ones are unfertilized eggs, commonly known as dead eggs. When the goldfish eggs become between light cyan and light yellow, and the eggs contain small black spots, it means that as long as the temperature is appropriate, small goldfish can hatch in three or five days, so that they can enter the feeding stage. When the goldfish break their eggs and come out, they should be screened before feeding, mainly according to the shape of the goldfish. If the center of the tail fin of the goldfish is separated into a four split tail, they can continue to be put back into the feeding pool for feeding. When raising goldfish larvae, first fill the bucket with tap water two days in advance and put a few pieces of zeolite, so that the chlorine in the water can be removed. The newly bought fish tank should also be disinfected with potassium permanganate and then rinsed with clean water. Put some fine sand at the bottom of the goldfish tank, and then put some goldfish grass or some duckweed, which can purify the water quality. Finally, take some water from the breeding pool and mix it with the water in the fish tank, which is more conducive to the survival of goldfish larvae. Feed fish about twice a day. Try not to feed fish at night. Goldfish may die if they eat too much. It’s good for goldfish not to be exposed to the sun, but it’s also good for goldfish to grow. The control of the water temperature in the breeding pond is also very important. It is best to keep it at about 20 ℃ and the temperature difference should not exceed 6 ℃, otherwise it is easy to cause the death of colored eggs or increase the fry of opposite sex. In addition, the incubation time of goldfish eggs changes with the water temperature. It can be seen that the control of water temperature is very important. It is not so easy to hatch healthy fry. The owners must take good care of them.