Ancula fuegiensis is a species of sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.

This species was first described from Ushuaia, Argentina.

It has also been reported from central Chile.

[2] This goniodorid nudibranch is translucent white in colour with black spots.

[2] Ancula fuegiensis probably feeds on Entoprocta which often grow on hydroids, bryozoa and other living substrata.