Thuridilla vataae is a species of sacoglossan sea slug, a shell-less marine opisthobranch gastropod mollusc in the family Plakobranchidae.

It was first described by the French zoologist Jean Risbec in 1928; its specific name refers to the Bay of Anse Vata, just south of Nouméa, New Caledonia, where the type specimen was collected.

[3] Thuridilla vataae is found in the tropical and subtropical Indo-Pacific region, its range extending from South Africa to Japan, the Philippines, Northern Australia and Vanuatu.

Each sea slug later lays a gelatinous string of well-yolked, orange eggs, wound in a concentric spiral.

These nudibranchs feed on sponges, accumulate toxins from their food, and secrete them from glands on the mantle, making them unappetising to predators.