Crocodiles have "fish" in their name and can swim in the water like fish, so many people will think that crocodiles belong to fish. In fact, crocodiles are not fish, they belong to the phylum Chordata, Reptilia. Animals in the class Reptilia are all reptiles. Reptiles and fish are very different, and the two are not intersecting, from an evolutionary point of view, reptiles are more advanced than fish, there are some advanced body structure is not fish. Therefore, as a reptile, crocodiles must not be fish, and they should not be considered as a class because of the word "fish" in their names.
As mentioned above, crocodiles belong to reptiles in the Reptilia. And because reptiles and fish are two different animals, the two do not intersect, so crocodiles are not fish.
In fact, crocodiles are very different from fish, and they are different in some key characteristics. For example, from the point of view of movement, crocodiles can not only swim in the water, but also on land, they use the crawling way of crawling forward, which is a unique feature of reptiles; Fish, on the other hand, can only move in the water, not on land. For example, from the way of breathing, crocodiles have lungs, and breathe with lungs; Fish breathe through their gills. It can be seen that crocodiles are very different from fish and do not belong to fish.
