Red arowana is an ancient fish, which is relatively large in size and grows rapidly. Under the condition of reasonable feeding, the red arowana can grow 15-20 cm a year, and generally can grow completely in 4-5 years.

In concrete quantification, the silver arowana in the first year is as long as chopsticks, the silver arowana in the second year is as long as a computer case, the silver arowana in the third year is as long as someone's arm, the silver arowana in the fourth year is as long as the width of a room door, and the silver arowana in the fifth year is as long as a window. However, if the feeding is unreasonable, it will seriously affect their growth, and some of them can even grow about 10 cm a year.

The life span of red arowana is relatively long, but it is also affected by many factors. The first is the location of life. Red arowana growing in natural state can generally live for about 50 years. Red Arowana grown under artificial breeding can generally live for about 20 years. Secondly, the feeding environment. If the feeding is reasonable, it is no problem for them to live for 40-50 years.

But if they are not kept properly, they will reduce their living time, and some of them can only live for a few months. For example, if you don't change the water in the fish tank for a long time, the water quality of their life is too poor, if you don't treat them, the germs will spread continuously in their bodies, or if you feed too much at a time, it will affect their intestines and stomach.