Nembrotha livingstonei is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusk in the family Polyceridae. It was first described in 1933.
This species is known from the tropical Indo-Pacific Ocean.
Nembrotha livingstonei is a red-brown nembrothid that grows to at least 48 mm in length. The body is marked with white, orange and brown spots. The rhinophores are reddy-brown. The gill stalks and branches are white or yellow, while the gill pinnae are deep red.
Nembrotha livingstonei eats colonial ascidians.