Rhombatractus catherinae de Beaufort, 1910 The Waigeo rainbowfish (Melanotaenia catherinae) is a species of rainbowfish in the subfamily Melanotaeniinae.

It is endemic to West Papua in Indonesia.

It reaches a maximum length of around 7.5 cm.

[2] This species was described as Rhombatractus catherinae in 1910 by Lieven Ferdinand de Beaufort from a type locality which was given as a rivulet flowing into the Rabial River in Waigeo.

[3] de Beaufort gave this species the specific name catherinae to honour his wife, Catherine, who had assisted him on the expedition on which the type was collected.