Eel is a kind of fish. In terms of category, eel belongs to Osteichthyes, a kind of bony fish, which also belongs to Anguilliformes and Anguillidae. From the point of view of appearance, the body shape of eel is very special, which is different from most other fish. On the whole, their shape is similar to that of snakes, and they have no scales, which is a special kind of fish.
From the point of view of feeding habits, eel's food is mainly various animals in the water, so it is a carnivorous fish. They can eat a variety of animals in the water, such as small fish, shrimp, crabs and various aquatic insects. As they grow in size, their ability to hunt increases, and they can eat more kinds of food. In terms of size, eels are not particularly large. The length of wild eels is between 60-90 centimeters, and there are more than 1 meter, but less; Eels in captivity are even smaller, and their body length may be only 40 or 50 centimeters.
From the point of view of the living environment of fish, fish can be divided into freshwater fish and marine fish. Among them, living in the freshwater environment is freshwater fish, living in the sea is marine fish, the difference between the two types of fish is still relatively large. However, eels are a special kind of fish, and they can not be classified as one of them. Because some eels have the habit of migration. In other words, their living environment will change. When eels are young, they live in fresh water and can be said to be a freshwater fish. When they are mature, they will go to the ocean to breed, and in this respect, they can be regarded as a kind of marine fish.
