Mexichromis lemniscata is a species of colourful sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.

It is reported from the tropical Indo-Pacific Ocean including the Red Sea, Réunion, Thailand, Australia, Fiji, Moorea and the Phoenix Islands.

[4][5][6] Mexichromis lemniscata has a pale pink-red body, with a white and purple-lined mantle.

The gills and rhinophores are covered with different coloured rings, from base to tip, white-red-purple-lilac.

[9] Mexichromis lemniscata can reach a total length of at least 35 mm, and like all Chromodorids, feeds on sponges.