Facelina olivacea is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Facelinidae.

[2] This species was described from Table Bay Harbour and Saldanha, Western Cape, South Africa.

[1] It is endemic to the Cape Province of South Africa.

[3] It has also been found at Knysna and Jeffrey's Bay, Eastern Cape on the Indian Ocean coast.

[4]