Trinchesia ocellata is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Trinchesiidae.
This species was described from the Gulf of Naples, Italy. It has been recorded on the coasts of the Mediterranean Sea from Italy to Spain.
Trinchesia ocellata is found on a number of colonial hydroids including Sertularella and Halecium labrosum.