Atagema ornata is a species of sea slug or dorid nudibranch, a marine gastropod mollusc in the family Discodorididae.

[2] It has been considered to be synonymous with Atagema intecta by some authors.

[3] This species was described from the Red Sea and is known from the Indian and western Pacific Oceans.

[3] This dorid nudibranch feeds on sponges.

This Discodorididae-related article is a stub.