There are few thorns. According to the Fisheries and Fisheries Management Bureau of the Ministry of Agriculture and Rural Affairs, the eel, commonly known as eel, is a tropical and warm temperate fish. The eel has only one three-sided spine on its body. It has few spines and thick flesh, and the meat is tender and delicious. Monopterus eel, also called eel, has a slender, snake-shaped body, about 20-70 centimeters in length, and up to about 1 meter in length. It has a pointed tail and a long and round head.