These two kinds are different. Qiaoertai generally refers to pike, which belongs to Bermudagraceae and Bermudagrass. Crocodiles, Monoptera, Monoptera, Monoptera. Different body types: Joertai adult males can reach 100 cm and females can reach 150 cm. In natural water, some large individuals can weigh up to 35 kilograms. The body is slender, the side is slightly flat, the tail handle is short, the head is pointed, and the kiss is long and flat, like a duckbill. The mouth fissure is wide, and the mouth length is about half of the head length. The teeth are well developed, and there are cone-shaped sharp teeth of different sizes on the upper and lower jaws, plough bone, ethmoid bone and tongue. Teeth are special. Maxillary teeth can be extended and connected by ligaments, which can be used to hang caught food or unfinished food on teeth for later use. Small in scale. The lateral line is not obvious. The dorsal fin and the anal fin are located at the back of the body and basically opposite, close to the caudal fin; The pectoral fin and ventral fin are smaller; Tail fin fork The back is yellowish brown with black fine longitudinal stripes. There are many light blue spots or white spots on the side, the abdomen is white, the fins are yellow and reddish, and there are black spots on the fins. Crocodile eels can grow to 3 meters. The body is slender and the upper and lower jaws are also very long. The mouth is deeply cracked and has sharp teeth. The dorsal fin is opposite to the gluteal fin and located at the back of the body; Fat-free fin; Abdominal position of ventral fin. Each fin has no hard spines. Side line complete. The swim bladder has a swim bladder tube connected to the back of esophagus, which is multilocular and shaped like a lung. The wall of swim bladder is densely covered with microvessels, which can support gas metabolism. The body surface is covered with diamond-shaped hard scales, the vertebral body is concave, and the tail is almost curved. It is a low-grade bony fish.