Snakehead is a freshwater fish, which mainly lives in rivers, lakes, reservoirs, ponds and other waters. As a benthic fish, it is suitable to live in places with aquatic weeds or silt at the bottom. In addition, it is widely distributed in China, except for the western plateau area, there are a large number of them in the Yangtze River Basin and Heilongjiang River Basin, and a small number in Yunnan and Taiwan.
The mucus outside the snakehead mainly plays a protective role. It can prevent the invasion of bacteria and viruses, but also can prevent harmful substances in water from entering the body. And when swimming, it can reduce resistance and make it faster. In the face of some natural enemies, such as larger carnivorous fish or waterfowl, it can also escape the attack of enemies by means of smooth mucus.
In the young fish period, the snakehead mainly eats the larvae of aquatic insects, and also eats some small fish and shrimps. When they grow to adulthood, they will feed on various small fish. Because of its geographical distribution, the food is also different. For example, in Heilongjiang area, the main prey is carp, crucian carp, Yarrow fish, etc., but in the Yangtze River Basin, the main prey is loach, loach and loach, and this kind of fish will kill each other.
