The Mary fish is small in size, which means that its life span will not be particularly long. Generally speaking, their life span is only 2 to 3 years. If they grow in the wild, some hardy fish can live up to six years. However, this is rare, and most fish live up to three years. Moreover, under the condition of artificial breeding, their life span will be shortened due to environmental constraints. Without intervention, they live about two years. Even in good conditions, they can only survive for three years at most, and generally not more than three years.
Generally speaking, Mary fish can mature after 5 to 6 months of growth. If they can get enough nutrition in the juvenile period, their reproductive period will also be ahead of schedule. But the growth and development of fish also need a certain process, the fastest can only be mated after 4 months. In addition, because the life span of Mary fish is relatively short, its breeding period is also very short, only less than a year. Therefore, only Mary fish aged between 5 and 17 months have the ability to give birth to small fish, and those too young or too old can not reproduce.
