Goniobranchus coi reaches 8 cm. Indo-Pacific nudibranch (Chromodorididae) with central cream-white mantle with spectacular concentric multicolor purple, blue, orange, yellow wavy margins, orange gills, orange rhinophores. Unique pattern among Goniobranchus. Lives from 5 to 30 m on coral reefs of central and western Indo-Pacific. Feeds on sponges. Iconic trophy macro photo subject of nudi-spotting dives for its spectacularly colored margins.
