Many families will raise some beautiful goldfish, which can be used for viewing. Their gorgeous colors and large tails are very beautiful, and they are easy to feed. They are good choices for pets and ornamental objects. I don’t know if you have them. I have thought that there are basically no fish species with rich colors like goldfish in the river. Facts have proved that goldfish cannot survive in the river water. They have adapted to the comfortable environment in the fish tank and will not find food by themselves. Carnivorous fish also have no counterattack. They swim slowly and will soon be eaten. In short, goldfish have been "domesticated" by humans, so the problem is that there is nothing like goldfish in the river. Colorful fish, what kind of fish are goldfish, and how are they domesticated?
Many people say that goldfish evolved from crucian carp, and it became so colorful after human intervention. At present, goldfish has evolved from the monotonous gray tone of crucian carp to more than 250 colors and appearance characteristics, more than a thousand years ago A few genetically mutated red crucian carp were discovered by people. They were specially caught home and raised, let them mate and reproduce, and then let the colored crucian carp continue to reproduce, and then follow the same method to retain the swollen eye vesicles of the goldfish, The big tail, fin shape and body shape slowly evolved into the various goldfish we see now.
The above are all people's guesses. From a scientific point of view, is this statement correct? At present, scientists have provided a scientific basis for the evolution of goldfish from crucian carp. Scientists have analyzed the body structure and genes of goldfish and found that goldfish belong to the subfamily carp, and crucian carp belongs to the same fish species. Some people have begun to study the carp before and after the Ming Dynasty. Family farming, raising them from the river to the basin, and after a long period of selection and optimization, only then have these goldfish look like they are now.
After talking about goldfish, I have to talk about koi. Many people may think that koi, like goldfish, is also an ornamental fish species produced by ancient Chinese through human intervention. But the fact is just the opposite. The koi we see now belongs to Japanese koi is not a native species in China. Chinese koi naturally has it, and it predates goldfish, probably before the Tang Dynasty. Koi once became a symbol of the Tang Dynasty, because the carp homonym "Li" is really because In this way, ordinary people were not allowed to raise them. Later, Li Tang was destroyed. Later dynasties even tabooed the breeding of this kind of fish. The nobles did not allow them to raise them, and the civilians did not allow them to raise them. In addition, goldfish appeared later and they were more beautiful than koi. It is also easier to raise, so the native Chinese koi gradually became extinct. In modern times, the Japanese koi was introduced to China, and China has it again.
