Five to seven pterygoid teeth form an outward convex shape. The inner nares open in an oblique groove. There are three gill slits. Body is stout, deeper than it is wide, having a slightly impressed mid-dorsal line. The head is widest in front of the gills.
Eyes are small and lidless.
The mouth is small and crescent shaped. Nostrils are small round or oval. The toes are blunt and horny. The tongue is large, filling the floor of the mouth, free at back and slightly at sides. The palatine teeth are in two contiguous patches on each side with the anterior patch longer and wider.