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Monopterus albus is one of the common animals. From the appearance, they are more like snakes than fish. But they do belong to fish by category, because they belong to the class Osteichthyes. They can also be classified as freshwater fish in terms of their habits and characteristics, because they generally move in freshwater. Specifically, the number of eels living in freshwater all over the country is relatively large, and they move at the bottom of freshwater such as rivers, lakes and streams. From the point of view of water temperature requirements, they are tropical and warm temperate fish species, which are distributed in both tropical and warm temperate regions.
Although rice field eels are classified as fish, they are very different from ordinary fish. From the point of view of breathing mode and respiratory organs, although Monopterus albus also has gills, which can play a certain role in breathing, it is not enough for them to breathe only by gills, but also by mouth, throat and epidermis to maintain their normal life activities, so they sometimes need to come out of the water to breathe, while other fish can basically breathe in the water. It is enough to rely solely on the respiration of the gills. In addition, from the fin point of view, many of the fins of the eel have been degenerated, such as the dorsal fin and the anal fin.
? As mentioned above, Monopterus albus belongs to fish and is a common freshwater fish. As fish, they can live in water and swim. However, their swimming ability is a little worse than other fish, usually they can only move in very shallow water, not too deep water. In addition, because they can not only breathe through the gills, but also through the mouth, throat and epidermis, they can not always be in the water, and sometimes they need to lean out of the water to contact the air above to complete the gas exchange.
