Goniobranchus aureomarginatus

Goniobranchus aureomarginatus is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.

Distribution
This species was described from Auckland harbour and Waiwera, New Zealand. It is apparently a New Zealand endemic.

Description
This chromodorid nudibranch has a white mantle which is edged with yellow. The rhinophores and gills are translucent white with some opaque white pigment on the gill rachis and the rhinophore lamellae.