Felimare pinna is a species of sea slug or dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.

[3] This species was described from Baía do Galeão, Maio, Cape Verde with additional specimens from Boavista.

[1] Felimare pinna is dark blue with a wide longitudinal white band in the middle of the back.

The sides of this band have quadrangular expansions in the form of battlements, alternating with areas of very dark blue colour in which there are conspicuous white spots.

The tail is also blue, with a median stripe of orange colour and little white spots that become smaller towards the foot.