The length of artificially bred zebrafish is mostly between 4-6 cm in adulthood. They belong to small tropical fish and have low requirements for the environment. As long as the breeding environment is comfortable, they can grow and develop well. Although they belong to tropical fish, they have strong cold resistance, and as long as they live in a large enough space, they will grow bigger. If breeders want to make them grow bigger, they'd better feed them more nutritious food. And ensure that their living environment is comfortable, so that their body shape can develop better.

The life span of zebrafish is relatively long, and their life span can reach 3-5 years when they are reared in captivity. They are less difficult to raise, and their life span can reach about 10 years under comfortable conditions. However, it is difficult for captive zebrafish to reach about 10 years, usually 3-5 years.

In addition, the life span of captive zebrafish will be affected in many ways. For example, poor water quality or too large temperature difference will cause them to get sick. Frequent sickness in zebrafish can also affect their longevity, and breeders need to reduce their chances of getting sick if they want them to live longer. Besides, whether the living environment is comfortable or not also has a certain influence on their life span. When they are raised artificially, they should also ensure that their living environment is comfortable.