1 cm black fry can grow about 3-1 cm a year. According to the relevant public information, snakehead is a freshwater fish, and its growth rate is related to environmental factors and feeding methods. Generally speaking, the black fry with the size of 1 cm grows rapidly in the first year. If the conditions are good, properly raised, fed on time every day and the water quality is maintained, it can grow by about 5-1 times a year.