Congroidei
Congroidei is a suborder of ray-finned fishes belonging to the order Anguilliformes, the eels. These eels are mostly marine, although a few species of snake eel will enter freshwater, and they are found in tropical and temperate waters throughout the world.
Families and subfamiles
Congroidei contains the following extant families and subfamilies:- Family Colocongridae D. G. Smith, 1976
- Family Derichthyidae Gill, 1884
- Family Ophichthidae Günther, 1870
- * Subfamily Myrophinae Kaup, 1856
- * Subfamily Ophichthinae Günther, 1870
- Family Muraenesocidae Kaup, 1859
- Family Nettastomatidae Kaup, 1859
- Family Congridae Kaup, 1856
- * Subfamily Congrinae Kaup, 1856
- * Subfamily Bathymyrinae J. E. Böhlke, 1949
- * Subfamily Heterocongrinae Günther, 1870