Facelina olivacea is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Facelinidae.Sartori, André F. (2015). Facelina olivacea Macnae, 1954. In: MolluscaBase (2015). Accessed through: World Register of Marine Species on 2015-12-25
Distribution This species was described from Table Bay Harbour and Saldanha, Western Cape, South Africa. It is endemic to the Cape Province of South Africa.Willan, R. (2015) Facelina olivacea. At Nudipixel.net. It has also been found at Knysna and Jeffrey's Bay, Eastern Cape on the Indian Ocean coast.Gosliner, T.M. 1987. Nudibranchs of Southern Africa. . Page 121.
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