PS: This standard is only for arowana above 20 cm.
Look at the box instead of the scale;
Why do you say that? In fact, it is also a helpless move. Someone bought six rows of gold "over the back", and after raising it for a while, it was found to be a B back or a high back. Therefore, we can't just look at which floor the ruler is arranged, but whether the ruler frame on that floor appears or not. The normal climbing arrangement should be the frame first and then the bottom, so the ruler frame really determines the number of rows, not the ruler. Borrow the "six-line scale shining way" mentioned in an essence post as follows:
Just bright, no mirror feeling, no border, be careful it will fade;
Only the bottom of the scale is bright, and the scale frame is still dirty. If you are careful, it will shrink back, or it may be a certain scale;
The bottom of the scale is bright, but the scale frame is a little hairy and mixed with dirt, and the discontinuous frame will remain, but the dirt left on the frame is difficult to fade;
The bottom of the scale is not bright, the border has appeared, it will not fade, and sometimes it is beautiful.
35 cm back or gold head, six rows have been painted and framed, generally will not fade. And the scale frame can reflect the scale type and scale melting of this fish, so the scale frame is very important.
Second, look down on gold:
In this era of grilled fish, it is no longer a problem to make six rows or even the whole head golden, but when the fish is big, it is found that its real strain is far from that of childhood. That is to say, what grows is what it grows, and what should be returned will still be returned, so it is impossible to evaluate arowana with gold (some of which are baked in platinum), especially small golden dragons under 30cm. It depends on the brightness of gold, that is, the brightness of the scale frame and the brightness of the bead scale.
Don't say that you can't raise it. The water quality is not good and the background is too deep. As long as it is super back, it will always be super back. Even if raised in a black jar, it will only be a little later than the white jar. If it is a high back, even if it is baked into a 24k gold head in a white jar when I was a child, it will definitely fade into a high back when I grow up. Genes decide everything, and time will tell. Therefore, the choice of Jinlong is based on brightness rather than gold content.
Third, look at the beads, not the head:
It may be because the streets are full of golden heads, so many people only look at the heads and ignore the pearl scales. Don't you know that pearl scales are one of the most critical indicators to judge the arowana strain? If the pearl scales of 20+ cm still don't show the quality below B, some pearl scales of 20+ cm at least show the quality above B, and some fishmongers don't know whether they really don't understand or deliberately deceive novices. Just bring some pearl scales. Just sell it on the back, and the pearl scales on the back should be completely bright when they are 20+ cm. The bead scales in the sixth row are all past lives, and even the bead scales can't be fully illuminated, let alone expect anything too good in the sixth row (except for a few invisible best: he climbs slowly, but he still has it on his back in his bones, and it will appear sooner or later).
It is necessary to popularize the basic knowledge of arowana here:
The so-called pearl scale refers to the small round scale near the root of the three-fin scale after arowana, which is named because of its shape. Correctly speaking, the small round scales near each fin of the rear three fins are pearl scales, which can also be called scales.
The number of rows of scales: the key is the lateral line hole, which is a row of small holes on the scales on the side of the body. This row of small holes is the third row of scales, and the upward numbers are the fourth row, the fifth row and the sixth row (behind). Some people count directly from the belly of the fish, and there is really nothing to say.
The standard of gem arowana: the scales are bright to the fourth row, and the pearl scales are not displayed;
The standard of high-backed arowana: the scales are bright to the fifth row, and the pearl scales are not obvious;
B mark of arowana: the fifth row of scales is bright, but the pearl scales are not completely bright;
The standard of arowana: the sixth row of scales is bright, and the pearl scales are all bright;
Notice that what I said above is just "bright" instead of "gold", or that sentence "look at the bright but not the gold"! Bead scales must be bright. The pearl scales are not bright, but the gold on them has no meaning, or it often means high back. Some of them, even without gold plating, can see bright edges like hair, which often means a B or a B.
Four look at the goods without looking at the picture:
Now is an era when it is difficult to distinguish between true and false. The appearance of PS greatly reduces the authenticity of the picture. An ordinary grilled fish, with a little decoration, can become the best in the competition, or even a golden dragon, which can be turned into a red dragon with just one or two clicks. Can you believe it? I really believe it! All my friends around me have this experience. A fish with a good picture was delivered, but things changed. The merchant said that the road was bumpy and tired, and the state had not come yet. After raising it for a while, the merchant will definitely say that you don't raise it ... and so on. This situation is not uncommon.
So how can you tell what a golden dragon looks like from the picture? Still combine the above three points, look at the pearl scale, see whether it is bright or not, and look at the frame instead of looking at the head, gold and advertisements. There are also many fish friends who send pictures for comments. You can know what you know about Jinlong from the picture you sent. Someone sent a picture of the whole tank, but the fish couldn't see it clearly at all. Some only have a big gold head or the first half; None of these can make others make accurate judgments. We need to send the second half (where the pearl scales are located) and the first half (where the scales are located in the fifth and sixth rows) of high definition, and we can basically distinguish the strain of this tail fish based on these two pictures. Moreover, the angle, light and clarity of the photo determine whether a picture really reflects the whole fish, so it is normal to judge the fish by the picture, unless those fish are the best at first sight.