Arowana (certain introduction)
The so-called "blue background" can be divided into two categories, One is the inner part of the scales except the first and second scale frames; the second is the inner part of the scales except the first scale frame, the second scale frame and its inner side are collectively called the "bottom". Because the definition of the second type is too harsh, as long as the fish with the first meaning is called "blue background over-back", according to this understanding, the over-back gold with blue color can be divided into There are two types of blonde hair color and golden hair color.
The texture of the blue part at the base of the scales is also particularly important. Almost all juvenile over-backed goldfish have some blue tint, and a considerable number of them have silky golden hair color when they are young. Because golden dragons will show different levels of blue color when they are young, and the blue background gene is genetically a weak link, it is difficult to accurately predict the color development direction of a fish. However, blue arowanas always have something unique in common:
1. The texture of blue is a smooth blue that is common in velvet, and there is less of a cold feeling from metal colors such as iron blue (such When the fish matures, they mostly have a thick-framed blue background).
2. The blue area is large, covering the entire area from the second scale frame to the bottom of the scales. For high-quality individuals, even the fifth row should not see any scale.
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