The bridge duckbill eel (Nettenchelys gephyra) is an eel in the family Nettastomatidae (duckbill/witch eels). It was described by Peter Henry John Castle and David G. Smith in 1981.Smith, D. G., J. E. Böhlke and P. H. J. Castle, 1981 (20 July) [ref. 6158] A revision of the nettastomatid eel genera Nettastoma and Nettenchelys (Pisces: Anguilliformes), with descriptions of six new species. Proceedings of the Biological Society of Washington v. 94 (no. 2): 533–560. It is a marine, deep water-dwelling eel which is known from the western Pacific Ocean, including New Caledonia, the Philippines, and Indonesia. It dwells at a depth range of . Females can reach a maximum total length of .
The species epithet "gephyra" means "bridge" in Ancient Greek, and refers to the link the species provides between the species Nettenchelys pygmaeus and Nettenchelys inion.
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