Body is elongate, narrowing posteriorly. The Rhinophores are lamellate, club-shaped and with white bands. Cerata are arranged into clusters in two rows along the dorsum. The Background colour is translucent gray with thick white or yellow patches running between the cerata clusters, on the margin of the dorsum.
A submarginal row of opaque white spots present along the sides of the body.Three white or yellow patches are on the head. Oral tentacles are long, translucent and white at the tips.Cerata are translucent with a brown or orange band about a third of the way down from the tip.
Nudibranch genus Flabellina feed exclusiverly on Hydroids.
Direct children (1):
Subspecies Flabellina engeli lucianae Dacosta, Cunha, Simone & Schrödl, 2007