The body length of sunfish in adulthood is generally between 24-40 cm, and the average weight is about 500 grams. They belong to small and medium-sized fish, and they are not very big in adulthood. However, how big they can grow depends on the environment in which they grow. If they live in a comfortable environment and have enough food, they will grow bigger.

If sunfish don't have enough space or food to live in, they won't grow too big. In addition, many sunfish are relatively small, weighing between 50 and 100 grams in adulthood. There are also medium-sized sunfish, such as the black thorn-covered sunfish, which will weigh between 350 and 680 grams in adulthood.

The life span of sunfish is not particularly long, generally only a few years, and some long-lived ones can live for about 6 years. The specific life span of sunfish is not fixed, and their life span will be affected by environment and species. If the living environment is not comfortable enough, the life span of sunfish will be shortened. If they live in a comfortable environment, their life span will generally be 5-6 years.

The life span of captive sunfish will be relatively short. To prolong their life span, we can minimize the frequency of their illness. They should also prepare a comfortable environment, so that their physique will be stronger and their life will be longer.