Acanthodoris armata is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusc in the family Acanthodorididae.
This is a taxon inquirendum.
This species was described from specimens found in the intertidal region at False Narrows, Nanaimo, Vancouver Island, Canada feeding on the bryozoan Dendrobeania lichenoides (Robertson, 1900).