The head is translucent white, except for the pink flesh of the outer lips and the overlying anterior of the head. It often has some blue iridescence. The oral tentacles are twice as long as the rhinophores. They are translucent white with white surface pigment distally and, often, iridescence proximally.
Length 12. 5 mm. North-east Scotland. May 2017. Leg. D. McKay & S. Taylor.