Hiện hành có 27 loài được ghi nhận trong chi này:[2]

• Gnathophis andriashevi Karmovskaya, 1990
• Gnathophis asanoi Karmovskaya, 2004
• Gnathophis bathytopos D. G. Smith & Kanazawa, 1977 (Blackgut conger)
• Gnathophis bracheatopos D. G. Smith & Kanazawa, 1977 (Longeye conger)
• Gnathophis capensis (Kaup, 1856) (Southern Atlantic conger)
• Gnathophis castlei Karmovskaya & Paxton, 2000 (Castle's conger)
• Gnathophis cinctus (Garman, 1899) (Hardtail conger)
• Gnathophis codoniphorus Maul, 1972
• Gnathophis grahami Karmovskaya & Paxton, 2000 (Graham's conger)
• Gnathophis habenatus (J. Richardson, 1848) (Little conger eel)
• Gnathophis heterognathos (Bleeker, 1858-59)
• Gnathophis heterolinea (Kotthaus, 1968)
• Gnathophis leptosomatus Karrer, 1982
• Gnathophis longicauda (E. P. Ramsay & J. D. Ogilby, 1888) (Little conger)
• Gnathophis macroporis Karmovskaya & Paxton, 2000 (Largepore conger)
• Gnathophis melanocoelus Karmovskaya & Paxton, 2000
• Gnathophis microps Karmovskaya & Paxton, 2000 (Smalleye conger)
• Gnathophis musteliceps (Alcock, 1894)
• Gnathophis mystax (Delaroche, 1809) (Thinlip conger)
• Gnathophis nasutus Karmovskaya & Paxton, 2000
• Gnathophis neocaledoniensis Karmovskaya, 2004
• Gnathophis nystromi (D. S. Jordan & Snyder, 1901)
  • Gnathophis nystromi ginanago (Asano, 1958)
  • Gnathophis nystromi nystromi (D. S. Jordan & Snyder, 1901)
• Gnathophis parini Karmovskaya, 1990
• Gnathophis smithi Karmovskaya, 1990
• Gnathophis tritos D. G. Smith & Kanazawa, 1977
• Gnathophis umbrellabius (Whitley, 1946) (Umbrella conger)
• Gnathophis xenica (Matsubara & Ochiai, 1951)