Goniobranchus tritos has a cream coloured mantle with round black spots, each of which is outlined with a white line. There is a broad band of lilac-grey around the mantle and a narrow line of opaque white at the edge. The gills and rhinophores are grey with white highlights.[4] The body reaches a length of 50 mm.[5]
References
^Yonow, N. (1994). Opisthobranchs from the Maldive Islands, including descriptions of seven new species (Mollusca: Gastropoda). Revue Française d'Aquariologie. 20: 4-25.