Felimida krohni is a species of colorful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.

[1][2] This species occurs in European waters (from France to the Canary Islands) and in the Mediterranean Sea (Greece).

The dorsal surface bears three longitudinal, white or yellow lines, sometimes continuous and sometimes interrupted and usually slightly raised.

These unite at the posterior end near where the purple branchial plumes project from the surface forming a ring around the anus.

In the Atlantic Ocean its range extends from the British Isles as far south as Cape Verde.