The longface eelCommon names of Saurenchelys cognita at www.fishbase.org. (Saurenchelys cognita) is an eel in the family Nettastomatidae (duckbill/witch eels).Saurenchelys cognita at www.fishbase.org. It was described by David G. Smith in 1989.Smith, D. G., 1989 [ref. 13285] [Various eel families] In: E. B. Böhlke (ed.) [ref. 13282]. Memoirs of the Sears Foundation of Marine Research Mem. 1 (part 9). It is a marine, tropical eel which is known from the western central Atlantic Ocean, including North Carolina and Florida, USA, the northwestern Gulf of Mexico, and Mobile Bay. It dwells at a depth range of . Males can reach a maximum total length of .

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