If it is freshwater cultured eel, the growth cycle is generally 1-2 years. Because the food is abundant and the environment is stable, they grow faster. In about a year, eels can grow to about 15 cm and weigh more than 500 grams. Therefore, after 1-2 years of breeding, they can grow to about 2-3 kg, and then they can be sold. However, the growth rate of eels is different in different growing environments and breeding methods, and breeders can judge the approximate growth cycle according to their body size.

The life span of eels is relatively long, and eels grown in the wild can live for about 50 years under suitable environment. But nowadays eels generally live less than 50 years. First of all, wild waters may be polluted, while eels like to stay in clean waters, and if they are polluted, their life span will be shortened. Coupled with human hunting, eels will have a shorter life span. Even artificially farmed eels will not live too long. Because artificially farmed eels are all commercial, they will not be raised for too long. However, the specific life span of eels is also affected by the environment and feeding methods. If the living environment is comfortable, the life span of eels will be longer.