Goniobranchus roboi, common name the tooth-edged chromodoris, is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae. This species was transferred from Chromodoris to Goniobranchus in 2012.
This marine species occurs in the tropical Indo-West Pacific. It was described from Okinawa, Japan. It has been reported from Queensland, New South Wales, Sulawesi, Réunion and South Africa. Similar animals from Western Australia have a different pattern on the mantle and are intermediate between G. roboi and Goniobranchus aurigerus.