1? Look at the size: The male arowana grows in the same environment, and its size is relatively large, its abdomen is relatively flat, and its size looks relatively slender. Female fish are shorter in size and slightly bulging in abdomen compared with male fish.

2, Look at the oral cavity: The oral cavity sizes of male and female red arowana are also different, because when they breed, the male fish will put their eggs in their mouths, and then release them after the small fish hatch successfully, so the oral cavity of male red arowana in adulthood will be larger. Female fish do not need to use their mouths to hatch small fish, so their mouths will be relatively small.

3. Look at pectoral fins: The color of pectoral fins of male and female red arowana is also different. In adult red arowana, the color of pectoral fins will turn red. However, the pectoral fins of male fish will be darker and the pectoral fins of female fish will be lighter. The breeder can easily see the difference by comparing male and female together.

The male and female red arowana are not recommended to be raised together. First of all, they are relatively large, and breeders need to prepare a very large fish tank for them to ensure sufficient living space. However, there is generally no big fish tank for family farming, so it is not recommended to raise it together. Furthermore, their character is fierce, and they often fight for territory or food. Therefore, it is not recommended to raise male and female together.