Pseudomyrophis frio is an eel in the family Ophichthidae (worm/snake eels).Pseudomyrophis frio at www.fishbase.org. It was described by David Starr Jordan and Bradley Moore Davis in 1891, originally under the genus Myrophis.Jordan, D. S. and B. M. Davis, 1891 [ref. 2437] A preliminary review of the apodal fishes or eels inhabiting the waters of America and Europe. United States Commission of Fish and Fisheries, Report of the Commissioner v. 16 (for 1888) (art. 9): 581-677, Pls. 73-80. It is a marine, tropical eel which is known from the southwestern Atlantic Ocean. It is known to dwell at a depth of . Males can reach a maximum NG of .

References