Asian swamp eel , belut, hingdung, lingdung, timpadang-padang, pla lai.
Scales are absent.
The snout is bluntly rounded, the jaws and palate have rows of viliform teeth. The upper lip is thick overlapping part of the lower lip. It is well equipped to inhabit anoxic environments. Larvae propel water about their body with their large muscular and vascularized pectorals. They absorb oxygen through their entire external surface as well as modified pectorals.