Tayuva lilacina is a species of sea slug, a dorid nudibranch, shell-less marine gastropod mollusks in the family Discodorididae.

[3] A number of species descriptions are considered to be synonyms.

[4] This species was described from Honolulu, Oahu, Sandwich Islands.

It has been reported widely in the Indo-Central Pacific and from the Pacific coast of Mexico and the Canary Islands.

[citation needed] Minimum recorded depth is 0.5 m.[6] Maximum recorded depth is 63 m.[6] Tayuva lilacina feeds on Haliclona caerulea according to the in situ observations on the Pacific coast of Mexico.