Cold-water fish is a species of fish, and we generally habitually call fish that can survive well at about 20 degrees or below as cold-water fish. Cold-water fish have the characteristics of low temperature resistance and strong adaptability, so it is more worry-free and labor-saving than tropical fish in feeding, and the following is an introduction to several common cold-water fish.
1. Goldfish
Goldfish originated in China, is China's unique indigenous fish species, as early as the Jin Dynasty there are goldfish written records, has a history of more than 1700 years, is now also one of the world's famous ornamental fish.
The source of goldfish was first domesticated by wild crucian carp, and after a long period of artificial domestication, the variety and color of goldfish have become rich and diverse.
As a representative of cold-water fish, goldfish have a very strong adaptability to water temperature, and can survive at 0-39 °C water temperature (but the temperature between 18-28 °C is more suitable for the growth of goldfish); prefer weak alkaline water (pH value between 7.5-8.0), and belong to omnivorous and carnivorous in terms of eating habits. When raising goldfish, it should be done to change the water frequently, to ensure that there is sufficient oxygen and clean water quality environment in the water, it is best to have 1-2 hours of sunlight every day, on the one hand, you can use the ultraviolet rays of the sun to sterilize and prevent diseases, at the same time, the sunshine can also make the goldfish better color, so that its color becomes more bright and beautiful.
2. Koi
Koi, native to Central Asia Minor, was later introduced to China, introduced to Japan in modern times, and flourished in Japan. At present, many of the world's excellent varieties are cultivated in Japan, so there are many koi varieties with Japanese colors (such as Showa tricolor, Taisho tricolor, etc.), so different varieties of koi also have great differences in price, cheap 2-30 pieces can be bought, the competition level can reach millions of per piece. Koi and goldfish are strongly adaptable to water temperature, can live in a water temperature environment of 5-30 ° C (the suitable growth water temperature is 21-27 ° C), prefer slightly alkaline, low hardness water quality environment, for omnivorous fish, mild nature, like to swim in groups, feeding is not difficult.
3. Chinese fighting fish
Chinese bucket fish is mainly distributed in the south of the Yangtze River in China, inhabiting small still water bodies such as ditches, ponds and rice fields, Chinese bucket fish is an omnivorous carnivorous fish species, the environmental requirements are not harsh, its adaptability is very strong, even in turbid dirty water can survive, the general temperature of 4-31 ° C can survive, (24-27 ° C is more suitable for its growth) The pH of water quality is suitable for neutral water (pH value is between 6.5-7), Chinese fighting fish is a nocturnal active fish, like a dark environment, so when feeding, you can plant more aquatic grass in the fish tank to simulate the native environment; Chinese fighting fish and Thai fighting fish, are aggressive, but the difference is that Chinese fighting fish can be properly farmed; there is also a precaution that when the Chinese fighting fish is frightened or the environment changes, the phenomenon of jumping tank will occur, so when feeding, you can add a lid to the fish tank to prevent the discovery of the jumping tank tragedy.
4. White cloud gold wire fish
Baiyun goldfish, also known as Tang fish, is a native fish species in China, distributed in the Pearl River Delta region of Guangdong, due to the destruction of the ecological environment of the habitat, the number of wild populations is sparse, belongs to the national second-level key protected wild animals, and the varieties sold on the market are artificially bred. White cloud goldfish like weak acidic water quality, the temperature can survive at 8-33 ° C (24-26 ° C is more suitable for its growth), and when the temperature drops to 5 ° C, it can still live normally, which can be seen in its strong vitality; its temperament is mild, belongs to the middle and upper fish, the water quality and food requirements are not high, just need to change the water regularly.
5. Rock-climbing loach (sucker, pipa loach)
Climbing loach is mainly distributed in the southern region of China, the body shape is similar to the pipa, so it is also called pipa loach, suitable water temperature at 18 ~ 28 ° C, climbing rock loach in the feeding habit belongs to omnivorous fish, inhabiting the rapid water flow, gravel mountain stream river, in the natural environment climbing loach will be adsorbed on the rock, scraping solid algae for food, so in the fish tank, climbing loach will be adsorbed on the tank wall scraping algae, play a role in cleaning the tank wall; when feeding, should maintain sufficient dissolved oxygen in the fish tank, can create some water flow, to simulate its original living environment.