The Muraenoidei contains the following nine families: • Infraorder
Muraenales • Family
Heterenchelyidae Regan, 1912 (mud eels) • Family
Myrocongridae Gill, 1890 (myroconger eels) • Family
Muraenidae Rafinesque, 1815 (moray eels) • Subfamily
Uropterygiinae Fowler, 1925 (tailfin moray eels) • Subfamily
Muraeninae Rafinesque, 1815 (morays) • Infraorder
Congrales • Family
Colocongridae Smith, 1976 (shorttail eels) • Family
Derichthyidae Gill, 1884 (longneck eels or narrowneck eels) • Family
Ophichthidae Günther, 1870 (snake eels and worm eels) • Subfamily
Myrophinae Kaup, 1856 (worm eels) • Subfamily
Ophichthinae Günther, 1870 (snake eels) • Family
Muraenesocidae Kaup, 1859 (pike conger eels) • Family
Nettastomatidae Kaup, 1859 (duckbill eels) • Family
Congridae Kaup, 1856 (conger eels) • Subfamily
Congrinae Kaup, 1856 (congers) • Subfamily
Bathymyrinae Böhlke, 1949 • Subfamily
Heterocongrinae Günther, 1870 (garden eels) ==References==