Koi is a very popular fish. It is known as a "living gem in the water" and a "swimming work of art" because of its beautiful appearance. It is widely produced and developed in Japan and has been popular in China in recent years. They are widely bred, thus joining the market and becoming an indispensable member of aquatic pets.
Koi belongs to the order Cypriniformes, the family Cyprinidae, the subfamily Cyprinidae, and the genus Cyprinidae. It is a wide-temperature fish. The suitable water temperature is 5~30℃, and the most suitable temperature is 21~27℃. However, it is not very adaptable to sudden changes in water temperature. If the temperature difference is above 3 to 5°C, koi will get sick: koi is suitable for weakly alkaline water with a pH value of 7.2 to 7.4; and iron ions, chloride ions, The content of sulfate ions is small, the dissolved oxygen is abundant, and the hardness is low. Koi is omnivorous and eats molluscs, aquatic plants, benthic animals and tiny algae. Koi is an egg-catching animal. The male fish is 2 years old and the female fish is 3 years old. They lay eggs once a year. The spawning period is generally from April to June every year. The lifespan of koi is very long, generally up to 70 years. The currently largest koi weighs 45 kilograms and is more than 150 centimeters long.
Koi is called the "living gem in the water"
Koi is also divided into many varieties, and its classification methods are as follows Two types, according to the difference in scales, koi can be divided into two major categories, namely common scale type and scaleless or few scale type. The scaleless or few-scale koi is called the German system koi, which is a breed created by hybridizing the scaleless leather carp, the few-scale mirror carp and the koi introduced from Germany. According to the color of the pattern, koi can be divided into three major categories, namely single-color type, such as gold koi, etc.; two-color type, such as red and white koi, white koi, etc.; three-color type, such as Taisho three-color koi (definitely Introduction), Showa three-color koi, etc. The main body colors of koi include sky blue, silver grey, bright red, golden, light yellow, milky white and five-flowered. Summarizing various characteristics, koi are generally divided into 13 categories. Each category is based on the color and pattern of the koi's body. There are many varieties, but the most highly rated strains are red and white, Taisho three-color and Showa three-color koi.
Koi is also a symbol of safety. It is called a "good luck fish" in Chinese culture. In addition to its unique and beautiful appearance, if you are interested, hurry up and try it.
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