Eels have spines. Eels belong to the family Anguilla. Although their appearance is similar to that of snakes, they are still a kind of fish. Most fish have spines, because spines are very important to them. The spines of fish are similar to human bones, and they are all used to support the body, so eels also have spines. The role of thorns in eels is very great. With fishbones, eels can carry out various activities more smoothly, and fishbones can also protect the internal organs of eels and reduce the probability of injury.

Although eels have spines, they don't have many in their bodies. Compared with other freshwater fish, it is a kind with fewer thorns. They basically have only one main thorn in their bodies, which is also their spine. This main thorn is relatively large and runs through the whole body, so there are relatively few small thorns around it. Because eel has fewer thorns and high nutritional value, it is loved by many people.

Eels have no scales. Although they belong to fish, they are scaleless fish. They have no scales because they drill around the rocks and uneven places under the water all the year round, so their scales slowly degenerate. Eels are similar in shape to snakes, but they have the basic characteristics of fish. Eels are similar to salmon and have migratory habits.