Arowana means that the six rows of scales on their bodies are all the same color. For example, the scales of arowana are all golden, and the scales of arowana are all red. Under normal circumstances, only adult arowana can judge whether to backcross. In addition, in addition to the color of scales, the pearl scales of arowana are also relatively bright, and the pearl scales of the whole body will glow. First, the back of arowana means that the scales on their bodies are all the same color. For example, the scales on the back of arowana are all golden, and the scales on the back of arowana are all red. If it is an arowana without a back, the scales on the back are mostly black or dark.

Young arowana can't tell if they have turned their backs. Only when you are an adult can you judge whether you have crossed your back by the color of the scales. In addition to judging by the color of scales, breeders can also judge by the scales of pearls. Under normal circumstances, the pearl scales of arowana will be lit up and will be very bright.

Second, the arowana is the best whether it is high back or good back, because backcrossing arowana means that the six rows of scales on their bodies have become the same color, and the scales of the sixth row of arowana are all on their backs. Many arowana have black or dark scales on their backs.

However, the scales on the back of arowana are not completely uniform in color, but their scales and pearl scales will reach the fourth or fourth or fifth row. The color of the back of the high-backed arowana can not be changed into a uniform color, and it is best for the horizontal-backed arowana.

However, there are few arowana with backs, and arowana with backs is considered to be the best among arowana, and the number is very small, so it is difficult to breed.