About Ceratosoma gracillimum C.Semper, 1876
Ceratosoma gracillimum C.Semper, 1876 is a species of sea slug, specifically a dorid nudibranch. It is a marine gastropod mollusk that belongs to the family Chromodorididae. This species was first described from material collected in Bohol, Philippines. It is currently known to occur in Indonesia, Vietnam, and the Great Barrier Reef, Australia.