Can fish survive in sewers? The answer is yes, and there is more than one. In China, there are two typical kinds of fish that can survive in sewers: mosquito fish and catfish. First, we simply feed the fish. As early as 19 13, Taiwan Province Province introduced a fish from the United States for the first time. The purpose of introduction is for mosquitoes. It used to be all the rage. Eating fish was very popular because it had a disproportionate name called "big belly", because it was called "anti-mosquito hero" by the United States in the early 20th century.

Later, in the 1920s, mosquito fish were introduced from Taiwan Province Province to the south of China, and then they settled in China. However, through scientific research, it is found that mosquito fish do not "mainly feed on mosquito larvae" as the United States said, but mainly feed on plankton (copepods and cladocera are the most common), which is only the second place for mosquito larvae. However, with the introduction of fish from all over the world, no one noticed that eating fish is really a master of mosquitoes, so mosquito fish with strong adaptability, complex feeding ability and strong reproductive ability successfully entered the wild water bodies in China and began to slowly squeeze the living space of similar niche fish and became an "invasive species".

Even today, they can still be found in wild water and even in sewers in some areas. As early as 20 14, 1, qianjiang evening news Road, mosquito fish is the most flexible economic fish, which can adapt to very harsh environment, including "extremely dirty" sewers: in the center of Wenzhou, a municipal garden construction company dredged the sewer pipe of a residential area, and suddenly cleaned up five live catfish, with no difference in size, and the largest one was 80 cm long.

Catfish mainly live in two kinds of water bodies: fish ponds and natural water bodies. In these two kinds of water, catfish like to live in the middle and lower water layers. However, if you carefully observe the manhole cover in the city, you will find that sewage, electricity and rainwater are independent pipes. Power pipelines generally do not deliver water, and sewage generally has a separate system, which needs to be put into the sewage treatment center to meet the discharge standards.