The Colocongridae, the worm eels or short-tail eels are a family of eels, containing a single genus, Coloconger.
Colongrids are found in tropical waters of the Atlantic, Indian, and West Pacific oceans. They are bottom-dwelling fish, living in waters from 300 to 900 m (980 to 3,000 ft) in depth. Compared with other eels, they have relatively short and stubby bodies, with blunt snouts.