Marine fish and river fish are two different kinds of fish, and these two kinds of fish are classified according to their living environment.In this respect, mackerel can be divided into marine fish.Mackerel lives in the ocean, in the long process of survival and evolution are living in the ocean, so there is no doubt that it is a marine fish, their body is adapted to the marine environment, especially salinity and water pressure.Because of the great difference between freshwater and seawater environment, mackerel can not live in freshwater rivers and adapt to the environment, so it can not be classified as river fish.
As mentioned above, from the living environment of mackerel, they live in the ocean, that is, marine fish.The specific distribution of mackerel is mainly in the western part of the Pacific Ocean, and the number of mackerel is relatively large in some coastal areas of China.In addition, mackerel is also found in the coastal waters of the Atlantic Ocean.Mackerel is a pelagic fish, which moves in the middle and upper layers of the sea, and generally does not see them at the bottom because they are not demersal fish.In addition, from the depth of distribution, mackerel will not be distributed in very deep parts of the sea, but basically live in offshore areas, that is, where the sea is relatively shallow.
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