Ancula espinosai is a species of sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Goniodorididae.
This species was first described from Punta Mona, Manzanillo, Limón, Costa Rica.
This goniodorid nudibranch is translucent white in colour with red markings.
Ancula espinosai probably feeds on Entoprocta which often grow on hydroids, bryozoa and other living substrata.