Translucent white body tinted orange with no surface markings. Cerata, with maroon brown internal granular digestive glands, are arranged in twelve transverse rows on each side of the body with up to seven cerata per row.
The head has translucent white oral tentacles with no surface pigment, and translucent orange-brown rhinophores.
Fully grown adult. South-east Scotland, June 2015, © J. Anderson.