Crocodile is a very famous animal, they are a very fierce animal. Because of the word "fish" in their name and their ability to move in the water, many people think that crocodiles are a kind of fish. But crocodiles are not fish. Crocodiles belong to the class Reptilia, so they belong to the group of reptiles. Reptiles and fish do not intersect, although they belong to vertebrates, but are two different animals, so crocodiles as reptiles are not fish.
In fact, from the comparison of crocodiles and fish, the difference between the two is relatively large, so crocodiles are not fish. For example, from the point of view of living environment, crocodiles can not only live in water, but also on land. Crocodiles move on land in a crawling way and can move freely. But fish, on the other hand, can only live in water and die quickly on land. For example, from the point of view of respiratory organs, crocodiles and fish are also quite different. Crocodiles breathe with their lungs, but fish have no lungs. They breathe with their gills. Crocodiles can't stay in the water for long because they breathe with their lungs.
As mentioned above, crocodiles are not fish, but their names contain "fish". Crocodiles are named "crocodiles" because they can live in the water like fish, and have strong swimming ability, can move freely in the water, prey on a variety of aquatic animals. Because of this characteristic of crocodiles, they are named "crocodiles".
