1. Size differences: Most fish will be larger than the male female fish, silver arowana is no exception. And the male is slightly longer than the female.
2. Head difference: Male fish because of the need to contain eggs, so the head is significantly larger than the female fish.
3. Gills difference: The gills of the female fish has a very obvious mark, you can clearly see the mark is A-shaped. Its arrowhead part is also shorter. The A-shape of male gills is irregular, and the arrow part is longer.
4. Pelvic differences: The male's pelvic fins are very pointed and very long. The female's pelvic fins are not particularly long, nor are they as pronounced as those of the male.
5. Abdominal Difference: The abdomen is very distended because the mature female needs to ovulate. The abdomen of male fish is not so bulging, which is the normal form. This is also an important feature that directly distinguishes them from male and female.
In the juvenile period, silver arowana attack ability is weak, female and male fish put together is no problem. When they grow up, they will have a strong sense of territory. When they are placed in the same tank, they will fight for their territory, which is not conducive to conservation. If it is not for the female and male fish to reproduce, it is better not to keep them together.
