Baeolidia harrietae is a species of sea slug, an aeolid nudibranch.

It is a marine gastropod mollusc in the family Aeolidiidae.

[2] This species was described from the Great Barrier Reef, Australia.

It has been reported from Papua New Guinea, the Philippines and the Ryukyu Islands, Japan.

[3] Baeolidia harrietae is an extremely flattened animal which hides on the surface of the colonial zoantharian Palythoa.