The longest life span of crucian carp is about 15 years, but under normal breeding conditions, the life span of crucian carp is generally about 10 years. They don't have high requirements for the environment. As long as the breeder ensures that the environment in which they live is stable, they can live for about 10 years. But many captive carp live less than 10 years, because they are food fish and will be sold after growing for several years. Only wild crucian carp can reach about 15 years, but after the wild waters are polluted, their life span will be reduced.

Under normal feeding conditions, crucian carp can mature about 2 years after birth, and then they can produce. There are also some precocious crucian carp, which can mature about one year after birth. When they have the ability to reproduce, they can mate and produce in the right season. If it is in the south, it usually begins to lay eggs in March. If it is in the north, it will take about 4-5 months to produce.

Carassius auratus does not require high production environment, and the amount of reproduction is relatively large. As long as the breeder ensures that the environment in which they breed is stable, they can breed normally.