Mickey fish is a small fish. They are very short. Under normal breeding, they can usually grow to 3-4 cm. However, if they are raised irrationally, their growth length will be shortened. They usually only grow to 2-3 cm. In addition, genetic factors also affect their body length. Some inbred Mickey fish will suffer from some genetic diseases, which will cause them to grow up. Therefore, when choosing parent fish, it is best to choose three generations away. Other species of ornamental fish, some female fish and male fish body length will be different, Mickey fish female fish and male fish body length is almost the same.

Mickey fish grow fast, and they can grow in almost 2-3 months. They grow faster in the first month after birth, and most of them can grow about 1.5 cm. With the progress of growth and development, their growth speed also slows down until their growth and development are completed and they stop growing.

By March-April, all organs in their bodies have completed their growth and development, and entered the mature stage. At this time, the male fish will chase the female fish and breed offspring. These mean that if the production environment is suitable and the food is sufficient, the growth rate will slow down if these conditions are not met. Therefore, when raising them at home, they should be provided with a suitable environment and enough food.