Pseudomugil ivantsoffi is a species of blue-eye from the subfamily Pseudomugilinae, part of the rainbowfish family Melanotaeniidae. It is endemic to Western Papua in Indonesia.[1] It was described in 1999 by Gerald R. Allen and Samuel J. Renyaan from types collected in southern Irian Jaya at two locations one a tributary of the Kopi River approximately 1km (01miles) of the Tembagapura Road and from the mile 39 Camp of the Freeport Mining Company in 1995.[1]
They named the species in honour of the ichthyologist Walter Ivantsoff of Macquarie University in Sydney.[2]