The shape of the body is oval to elongate. The dorsum is soft and without tubercles. Background color is extremely variable, white, black, orange, red or light green, with or without spots of red, black, gray or white. Rhinophores and gill are usually the same color as the rest of the body with white tips. The maximum recorded body length is 120 mmWelch J. J. (2010). "The “Island Rule” and Deep-Sea Gastropods: Re-Examining the Evidence". PLoS ONE 5(1): e8776. doi:10.1371/journal.pone.0008776. or up to 150 mm.
