Flower eel is also known as perch eel, flower eel, snow eel, king eel, eel, eel, reed eel, brook eel. The body shape of the flower eel is similar to that of the eel, with a long body, a thick cylindrical front, and a laterally compressed tail. The head is conical, with short spacing between the dorsal and anal fins. The snout is flat. The angle of the mouth exceeds the posterior margin of the eye. Mandibles slightly protruding, central toothless; anterior end of both jaws finely toothed in clusters, lateral teeth in rows. Lip folds broad and thick. Gill pores small. Scales fine, arranged in mat-shaped scale clusters, clusters crossing each other vertically and buried under the skin. Lateral line complete, lateral line pores conspicuous. Odd fins interconnected; dorsal fin low and long, origin closer to gill pore than to anus. Spacing between dorsal fin origin and anal fin origin greater than head length. Pectoral fins rounded. Ventral fin absent. Vertebrae 100-110. Dorsal side of body and fins covered with tan spots, interspaces between body spots and margins of pectoral fins yellow. Ventral side white or blue-gray, dorsal and posterior margins of anal fins black.