Ophichthus tetratrema is an eel in the family Ophichthidae (worm/snake eels).Ophichthus tetratrema at www.fishbase.org. It was described by John E. McCosker and Richard Heinrich Rosenblatt in 1998.McCosker, J. E. and R. H. Rosenblatt, 1998 (18 Dec.) [ref. 23645] A revision of the eastern Pacific snake-eel genus Ophichthus (Anguilliformes: Ophichthidae) with the description of six new species. Proceedings of the California Academy of Sciences v. 50 (no. 19): 397-432. It is a marine, deep water-dwelling eel which is known from the eastern Pacific Ocean, including Costa Rica and Ecuador. It dwells at a depth range of . Females can reach a total length of .
The species epithet "tetratrema" means "four holed" in Greek, and is treated as a noun in apposition. It refers to the four preopercular pores on the eel.
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