Sea eel, economic fish; Fierce carnivorous fish. Bony fish, Eelliformes, Eellidae, Eellidae. The body is long cylindrical and the tail is flat. The tail is longer than the sum of the length of the head and trunk. The head is long and pointed. The eyes are oval. The mouth is very big, and the tongue is attached to the bottom of the mouth. Maxillary teeth are firm and sharp, with 3 rows; There are 10- 15 flat big teeth in the middle of the plough bone.
The body has no scale and has 140- 153 side holes. The dorsal fin and the anal fin are connected with the caudal fin. The body is yellowish brown, and large individuals have 1 dark brown stripes along the base of dorsal fin. Vertebra 142- 154. Widely distributed in eastern Africa, Indian Ocean and Pacific Northwest. China's coastal areas have production, mainly in the East China Sea.
Fish near the bottom of warm water. Poor cluster intercourse and wide temperature, euryhaline. Usually inhabit the bottom waters with a water depth of 50-80 meters. Have seasonal migration habits. The water depth of spawning ground is generally 20-40m, and the bottom material is sand and mud, with average water temperature 13.5-20 degrees Celsius and salinity of 29-34. Is a long-lived species, up to 16 years old. Fierce carnivorous fish mainly feed on shrimp, crab, fish and some cephalopods, which are eaten almost all year round with great intensity.
Eellidae fish are widely distributed in the tropical waters of the world's three oceans, usually inhabiting sandy bottom waters, with a water depth of about 50-80 meters, with seasonal migration characteristics. They swim fast and have fierce personalities. They are famous fish predators. At present, there are about 4 genera and 8 species in the world, and there are 3 genera and 4 species recorded in Taiwan Province Province.