Anguilliformes (subclass Actinopterygii, superorder Elopomorpha) An order of eel-like fish with elongate, cylindrical bodies, narrow gill apertures, a tail fin confluent with the low dorsal and anal fins, no ventral fins, and the skin either naked or with minute scales. The order comprises about 22 families, including the Anguillidae (eels), Muraenidae (moray eels), and Congridae (conger eels).
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