Born once a month. Anchovies have short life span and strong reproductive ability. The life cycle of anchovies is usually only 2-3 years, but they can reproduce many times in this short life. Moreover, the culture frequency of anchovies is relatively high, and each culture can produce 10- 120 small fish. These characteristics enable anchovies to produce a large number of offspring in a short time, and to breed more fish schools in a short time.