Mystriophis crosnieri, known commonly as the spoon-nose eel in the United Kingdom,Common names of Mystriophis crosnieri at www.fishbase.org. is an eel in the family Ophichthidae (worm/snake eels). It was described by Jacques Blache in 1971.Blache, J., 1971 [ref. 7667] Contribution à la connaissance des Poissons anguilliformes de la côte occidentale d'Afrique. Onzième note: les genres Mystriophis et Echiopsis (Fam. des Ophichthidae). Bulletin de l'Institut Fondamental d'Afrique Noire (Serie A) Sciences Naturelles v. 33 (no. 1): 202-226. It is a marine, tropical eel which is known from the eastern Atlantic Ocean, including Senegal, Angola, and the western Mediterranean. It dwells at a depth range of , and forms burrows in sand and mud sediments on the continental shelf. Males can reach a maximum total length of .

The diet of M. crosnieri consists of benthic crustaceans.Food items reported for Mystriophis crosnieri at www.fishbase.org.

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