; subclass Actinopterygii, order Anguilliformes)
A small family of marine, eel-like fish that have a cylindrical body, scaleless skin, narrow head with large eyes, strong teeth, and the dorsal fin starting above the well-developed pectoral fins. Some species are known to enter brackish water. These rather aggressive fish are found throughout the world in tropical to subtropical seas, and some are quite large (e.g. Muraenesox arabicus, 2 m). There are about seven species.
Subjects: Zoology and Animal Sciences.