Tenellia adspersa, common name the miniature aeolis, is a species of very small sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Trinchesiidae.

[2] The color of this nudibranch is generally pale yellow to light brown, with black speckles.

[3] This species is fully protected in the United Kingdom under the Wildlife and Countryside Act 1981 since 1992.

It prefers small rocks to sea grass bottoms, and occurs on man-made substrates as well.

[3] Tenellia adspersa is a carnivore feeding primarily on hydroids such as Cordylophora caspia.