Goldfish is a common wide-temperature fish, which has been cultivated in China for more than 1700 years. This kind of fish is bred by crucian carp, so it has strong adaptability to temperature and can survive in the environment of 0-10 ℃, but it is best not to freeze the water, otherwise it will still pose a certain threat to its health and even survival.

Koi is an ornamental fish bred by carp, so their habits are basically the same, and they are both wide-temperature fish, which can adapt to a wide range of temperature and survive in water at 0-10 ℃. It is worth mentioning that this kind of fish is relatively large in size, so its appetite is not small. It is necessary to control the feeding in artificial breeding, so as not to break its stomach.

It is also called mirror fish, which is a small freshwater fish and does not require high temperature. It can not only be used as an ornamental fish, but also has edible value. It is distributed in many places in China. It is worth mentioning that mussels must be used for reproduction.

Baiyun Jinsi is a unique ornamental fish in China, which is mainly distributed in southern China. Although they live in warm waters, they have strong cold tolerance. This kind of fish is small in size and mild in temperament. It generally moves in the middle and upper layers of water, and can eat a lot of things, which can endure the low temperature of 5 ℃ at the lowest.

Guanbei medaka is a small freshwater ornamental fish bred from wild medaka. Different from common tropical fish, its biggest feature is that it is not afraid of cold, and its water temperature can survive between 1-35 ℃ 1. Moreover, it does not need filtration and oxygen, so it is easy to raise and can be artificially propagated.