1, the pedigree of the back determines its two most important characteristics-after climbing over six rows, all pearl scales are lit up.

2.B's performance is slightly inferior. First of all, the sixth row will not completely climb back, and it will not light up all the beads, but it will light up some beads.

3, high back; The high-backed arowana is not a pure arowana, but a hybrid of the super-backed arowana and the red-tailed arowana. Its main manifestations are crawling back and bead scales. The climbing back of the high-backed arowana is bright from the belly to the fourth and a half rows or the fifth rows of scales, and some backs will also be bright. This is of course the best or the best of the high-backed arowana, but it is extremely rare. The performance of bead scales is not like the back, but the bits and pieces of stars are lit, not all of them are bright, or they are basically not bright.

Arowana is divided into Dragon King, Zhu Long, Super Blood Red Dragon, Purple Blood Dragon, Blood Red Dragon, Red Striped Blue Pepper, Pepper Red Dragon, Orange Red Dragon and Nothing from high to low. Half red dragon. There are achievements. The higher the grade, the more expensive it is. Long Fu Dragon King is the best. The body shape is different from that of golden dragon and red-tailed golden dragon (gem). The scales, snout, gill cover, fins and tail of fish are all red to varying degrees. It is subdivided into orange, pink, crimson, blood red and vermilion. The gill cover has obvious erythema.

Extended data:

Morphological characteristics of beautiful bony fish tongue;

The beautiful bony tongue fish is huge and flat, and its trunk is covered with huge and neatly arranged shiny scales; It has a big mouth and two tentacles at the corners of its mouth. It swims leisurely, just like the mythical "dragon", hence the name "arowana". Up to now, it still retains the body characteristics of ancient times, and is known as the "living fossil of fish", which is of great breeding and ornamental value. An ancient group of freshwater fish with bearded jaws, flat bodies and ribbed bellies.

When the fish is young, it is characterized by a thin golden frame with a light red stripe on the green background. When you grow up, the shallow scale frame will turn golden yellow, and the scales with golden blue or green background will reach the fifth row of scales and pass through the whole dark green back. The difference from red anger gold is the difference between anger and anal fin, and the back and upper part of caudal fin should be dark blue.

Baidu Encyclopedia-Beautiful Hard-boned Tongue Fish