Young guppies are in the developmental stage and grow very fast. When guppies are immature, that is, between 1 and 4 months old, they develop rapidly and change almost every day. After about 4 to 6 months, it can complete sexual maturity and then enter the breeding period. From then on, its development period is over. Generally speaking, fish are fully mature after 6 months of age. When mature, the growth rate of fish will become very slow. If you don't look carefully, you can't see its length change at all.
The average body length of adult guppies is 3 to 4 centimeters. Among them, the male body length is 3 to 4 centimeters, and the female body length is about 5 centimeters. So guppies are very small. Therefore, the length of a month is very limited. If it is still in the development of young fish, it changes in a month or more obvious. From birth to one month old, it can grow to 1 centimeter long. That's a lot of length for a guppy. However, the mature guppy will hardly change in a month. Especially the male fish, its body length is short. After entering the mature stage, it basically stops growing. If it is a female fish, it may grow 2 to 3 millimeters.
