The main differences between Japanese koi and domestic koi are as follows: First, the body shapes are different. Japanese koi is spindle-shaped, while domestic koi is short and wide. Second, the red color of Japanese koi is thick, the white color is white, and the color is deep black. The red color of domestic koi is light orange, the white color is yellowish, and the color is jet-like.
1. Japanese koi are thick in color and slightly metallic; domestic koi are lighter in color and slightly transparent. Japanese koi are wider laterally, especially the head, which is more obvious in large koi fish. The tail fin of Japanese koi is shorter and each fin is thick white; the tail fin of domestic koi is longer and each fin is translucent. Japanese koi shops only sell koi, while some domestic koi shops also sell goldfish. Japanese koi with a single tail weighing more than ten pounds give people an intuitive impression of being noble. Domestic second-generation koi, second-generation koi are small koi fish bred in some domestic private koi fish farms. The koi species are Japanese and are bred domestically. However, due to the relationship between raising koi feed and selecting koi, they are still related to imported first-generation koi. The difference is large. The color is mostly orange and there is little atavism. Due to the lack of geology in Japan and the habits of the Japanese, they will only leave high-quality koi for cultivation and careful breeding. However, some small koi fish farms in China can breed high-quality koi. In order to achieve higher economic benefits, the feed ratio and calculation process of second-generation koi are still very different from imported koi. High-quality koi in Japan generally have broodstock of 80%, which means koi fish that are more than 4 years old are used for breeding. In China, koi fish that are 2 years old are used for breeding due to profit-driven reasons.
2. Japanese koi fish are not only pleasing to the eye, but also if you just remember the essentials of raising koi, it is not difficult to successfully raise a large koi. As for koi feed, koi are omnivorous. Basically, koi can eat anything that humans can eat. Even if you don’t feed koi for more than a week, you don’t have to worry that koi will starve to death. This is now common. Using artificial feed specially designed for koi fish, it is simple and easy to raise, so no matter how busy you are, you can still enjoy the joy of raising it. It will definitely make you feel luxurious. This is the highest level of enjoyment. Domestic koi is a wide-temperature fish. The suitable water degree is 5-30°C, and the optimal temperature is 21-27°C; but it is not adaptable to rapid changes in water temperature. If the temperature difference is above 3-5°C, koi will get sick; the suitable pH value of koi is 7.2 A weakly alkaline water body of -7.4; with low content of iron ions, chloride ions, and sulfate ions; sufficient dissolved oxygen; and low hardness.
3. Japanese koi is a rare and large ornamental fish. It is the national fish of Japan and a living work of art created by the Japanese. It is known as the "living gem in the water" and the "king of ornamental fish". Koi has a strong physique, bright colors, changeable patterns, and majestic swimming postures. It has extremely high ornamental and breeding value. Its body length can reach 1-1.5 meters, and its lifespan is also extremely long. It can live for 60-70 years. It means auspiciousness and is said to bring good luck to its owner. It is a popular Feng Shui fish and ornamental pet. The Japanese often place ponds in their courtyards to raise koi. Since ancient times, there has been a saying about domestic koi that "carp jumps over the dragon's gate", which is a metaphor for a person's rapid rise to fame and a prosperous official career. Guangdong, Hong Kong and Macao believe in using water as a source of wealth, and raising koi in the courtyard or balcony has become a fashion. Breeding koi not only improves your mood and beautifies the environment, but as long as you have the correct appreciation and breeding methods of koi, you can buy promising small and medium-sized koi at a low price. After nurturing, if you can win an award at the koi evaluation meeting Then the price of koi fish will double. Not only can you enjoy the fun of raising and displaying koi fish, but the koi fish can also bring you great economic benefits.