Ilyophis robinsae is an eel in the family Synaphobranchidae (cutthroat eels).Ilyophis robinsae at www.fishbase.org. It was described by Yuri Nikolaevich Shcherbachev and Kenneth J. Sulak in 1997.Sulak, K. J. and Yu. N. Shcherbachev, 1997 [ref. 22986] Zoogeography and systematics of six deep-living genera of synaphobranchid eels, with a key to taxa and description of two new species of Ilyophis. Bulletin of Marine Science v. 60 (no. 3): 1158-1194. It is a marine, deep water-dwelling eel which is known from the Philippines, in the Indo-West Pacific. It is known to dwell at depths of to , and is the deepest known synaphobranchid.Linley, T.D.; M.E. Gerringer; P.H. Yancey; J.C. Drazen; C.L. Weinstock; and A.J. Jamieson (2016). "Fishes of the hadal zone including new species, in situ observations and depth records of Liparidae". Deep Sea Research Part I: Oceanographic Research Papers 114: 99–110. Lower abyssal and upper hadal records of I. robinsae are from the southwest Pacific trenches of Kermadec and New Hebrides. Males can reach a maximum total length of .
The species epithet "robinsae" was given in honour of Catherine Robins, credited with making substantial contributions to the knowledge of the family Synaphobranchidae.
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