How are the grades of koi fish divided and how many species of koi fish are divided into?

The grades of koi fish are usually divided into six grades: A, B, C, D, E, and F. The specific classification criteria are as follows:

A-grade**: well-proportioned, colorful, neat patterns, elegant and elegant, known as"The king of koi"。

Grade B**: The body shape is well-proportioned, the colors are more vivid, the patterns are more neat, and the posture is more elegant and elegant.

Grade C**: The body shape is relatively symmetrical, the colors are more vivid, the patterns are more neat, and the posture is more elegant and elegant.

Grade D**: The body shape is relatively symmetrical, the color is relatively bright, the pattern is relatively neat, and the posture is relatively elegant and elegant.

Grade E**: It is an ordinary commercial fish, with uneven body proportions, no particularly outstanding color and pattern, and elegant and elegant swimming posture.

Grade F**: Culled fish, usually malformed or poorly colored.

The classification of these grades is mainly based on a combination of factors such as the size, color, pattern and swimming posture of the koi, and the different grades reflect the different qualities and values of the koi.

Koi. Quite strict, 95% of a litter of fish have to be eliminated, and the eliminated ones will flow to the market, the varieties are different, and the ornamental requirements are not the same, usually depending on the appearance, texture, body type, and bloodline to distinguish this fish!

Because koi fish are very changeable, it is possible to say that if you buy a high-quality fish now, it may become the same as an ordinary fish in two years!

The grade of koi fish in the industry is divided into ABCDEF or AAA AA A B, etc., the standard is to look at the body shape and swimming pattern, and different varieties of fish have different requirements for the pattern.

Common koi species are, red and white, Taisho, Showa tricolor, epsom, beszel and so on.

Fish farming should first raise water, high-quality water is very important for fish, so it is necessary to choose a good fish pond filtration, chypu can, efficient sterilization. Algae removal and oxygenation.

There are 26 varieties of koi fish1. Koi.

2. Patterned skin light koi.

3. Gold and silver scale koi.

4. Four white koi.

5. Clothed koi.

6. Write about the koi.

7. Platinum koi.

8. White pine leaf koi.

9. Showa tricolor koi.

10. Write about koi carp.

11. Peacock koi.

12. Orange and yellow ** koi.

13. Red-crowned koi.

14. Variant koi.

15. Scarlet koi.

16. German air carp.

17. Taisho three-color koi.

18. Don't bother koi.

19. Write koi in white.

20. Deer spotted light yellow koi.

21. Red and white koi.

22. Light yellow koi.

23, red dragon phoenix carp feather white koi.

24, German purple carp.

25. German green carp.

26. Tea writes koi.

The two easiest ways to identify a koi fish are to look closely at the beard and look at the nostrils.

When you buy koi, you should pay attention to the whiskers of koi, although koi is a pure product of carp after mutation, but carp do not have whiskers; When she saw the grass gold with a beard again, Xi Aina didn't rush to buy it, although the grass gold has a long beard, but the koi fish has two pairs of beards. It should be noted here that when buying a small koi, the second pair of beards of the Tomori of the small koi is not easy to observe, but the first pair of beards is generally in a state of bifurcation, so it is relatively easy to distinguish.

The second is to observe the nostrils of the koi, if you don't observe carefully, you don't know that the koi have "four" nostrils that look like four nostrils; And there will be a thin layer of flesh flakes on top of the nostrils. If it is a dragon and phoenix koi, the nose flower will be larger, like a flower. And grass gold and carp only have a pair of nostrils.

Common varieties mainly include red and white koi, Taisho tricolor koi, Showa tricolor koi, writing carp, etc.

There are many types of koi fish, there are 13 categories in total, which can be divided into different sub-categories according to its body color and markings, mainly more than 120 sub-categories.

Koi fish are very active, so there is no need to make any decorations in the tank when breeding, so as to prevent koi from getting injured.

The room temperature must be controlled below 26 °C, if the temperature is too high, it will lead to a lack of oxygen.

1. Types of koi fish.

1. There are many types of koi fish, and there are 13 main categories of koi fish, which are divided into different sub-categories according to the color and markings on the body surface of koi, generally more than 120 sub-categories. The more common koi species are red and white koi, Taisho three-color koi, Showa three-color koi, writing carp, Beguang koi, light yellow koi, cloth koi, black carp, ** koi, gold and silver scale koi, red-crowned koi, writing skin light carp, etc.

2. Koi is a very lively and joyful fish, so there is no need to arrange any decoration in the fish tank, which can avoid causing harm to koi. Koi fish generally do not get sick, and the need for food is very small, and it is normal to feed them once a day.

3. During the maintenance period, the indoor temperature must be controlled below 26 °C, if the temperature is too high, the koi will be very prone to hail and oxygen deficiency. When the temperature exceeds 30 °C, be sure to inject oxygen source Wu Sen to the fish tank, ensure that the oxygen can be injected for 2-3 hours during the day, and the oxygen needs to be continuously injected at night.

Second, the breeding of koi carp should pay attention to matters.

1. Control density.

1) The density of koi fish must be controlled first, if too many koi fish are raised in small tanks, they will suffer from poor growth.

2) Generally, if you use a fish tank with a size of 60 30 15cm, the number of koi fish that can be raised is about 6, and you can't raise too much.

2. Change the water regularly.

1) It is also important to maintain water quality in koi farming, so be sure to change the water regularly and clean up the impurities in the fish tank, so as to provide a clean environment for the growth of koi.

2) The frequency of water change can be controlled in about 3-7 days, the frequency of water change in summer must be more frequent, and the interval time in winter must be slightly longer.

3) Each time you change the water, you can replace 1 3, in order to ensure that the water temperature does not change drastically, be sure to control the flow rate of the water, and slowly inject new water.

3. Reasonable feeding.

1) Be sure to use the normal feeding method, first of all, choose a good food, koi are omnivorous, so you must not use the same food, so the nutrition may be insufficient.

2) Tangerines can be fed with a mixture of plant and animal foods, such as greens, earthworms, bloodworms, etc., once or twice a day, once in the morning and once in the afternoon.

Mainly distinguish varieties by origin, pedigree, color and appearance. Koi generally have a long lifespan, several years or even more than ten years, less requirements for water depth and water temperature, and strong adaptability.

The original species of koi is the red carp. It was introduced to Japan from China in the early days. After artificial improvement, it was transformed into a crimson carp, also known as a color carp and a flower carp pinqiao, and was renamed a koi carp after World War II.

Koi species are divided into several strains based on their color. Koi fish are divided into nine strains and about 100 varieties. According to the distribution of color, markings and scales, it is mainly divided into 13 varieties.

1. Red and white koi: the authentic koi, the whole pure white background red spots, no entrainment of other colors, the bottom should be pure white like snow, the red spots are thick and uniform, and the boundary is clear.

2. Taisho tricolor koi: red and black markings on a white background, red spots without black spots on the head, and black stripes on the pectoral fin.

3. Showa tricolor koi: there are red and white patterns on a black background, and there are black spots at the base of the pectoral fin. There must be large dark spots on the head.

4. Black carp: white spots or all yellow spots on the whole black or black background.

5. Don't be light: Koi with black spots on a white, red or yellow background belong to the three-color strain of Wu Mengzheng.

6. Light yellow: light blue or dark blue on the back, white on the outer edge of the scales, and red orange dust on the cheeks, abdomen and base of each fin.

Red and white Taisho Showa It is commonly known as the Imperial Three Houses.

Then there are several varieties such as white writing, peacock, autumn cui, light yellow, bieguang, tea carp, deciduous carp, and variant carp.

Koi fish is also known as the "sacred fish" in Japan, symbolizing good luck and happiness. The Japanese view koi fish as works of art and can be divided into 4 to 5 varieties. 5.Begaku: Koi fish with black spots on a white, red, or yellow background, belong.