Goniobranchus coi has a white body and foot, but is instantly recognizable by its distinct dorsal pattern.
The outer part of the mantle is yellow, separated from the inner light-brown part by a wavy white and black line.
The outer edge of the mantle is brown, with a thin purple line at the margin.
The gills and rhinophores range in colour between different individuals from translucent white, through pale-yellow and light-brown.
This species reaches at least 50 mm in length.
Goniobranchus coi has a white body and foot, but is instantly recognizable by its distinct dorsal pattern. The outer part of the mantle is yellow, separated from the inner light-brown part by a wavy white and black line. The outer edge of the mantle is brown, with a thin purple line at the margin. The gills and rhinophores range in colour between different individuals from translucent white, through pale-yellow and light-brown. This species reaches at least 50 mm in length.
Goniobranchus coi