Eels (Anguilliformes) is a biological order of the phylum Chordata (Chordates) and class Actinopterygii (Ray-finned Fishes).
Colocongridae
Congridae
Synaphobranchidae
Nettastomatidae
Muraenesocidae
Chlopsidae
Anguillidae
Derichthyidae
Muraenidae
Heterenchelyidae
Serrivomeridae
Nemichthyidae
Moringuidae
Myrocongridae
Ophichthidae
Albuliformes
Clupeiformes
Lophiiformes
Osmeriformes
Ateleopodiformes
Aulopiformes
Batrachoidiformes
Beryciformes
Osteoglossiformes
Amiiformes
Siluriformes
Ctenothrissiformes
Cyprinodontiformes
Anguilliformes
Pleuronectiformes
Gadiformes
Semionotiformes
Gonorynchiformes
Gymnotiformes
Zeiformes
Lampriformes
Tetraodontiformes
Lepisosteiformes
Characiformes
Scorpaeniformes
Cypriniformes
Esociformes
Mugiliformes
Myctophiformes
Beloniformes
Ophidiiformes
Perciformes
Percopsiformes
Gasterosteiformes
Polymixiiformes
Polypteriformes
Saccopharyngiformes
Salmoniformes
Atheriniformes
Stephanoberyciformes
Stomiiformes
Acipenseriformes
Synbranchiformes
Elopiformes