Phyllidiopsis cardinalis
{{Short description|Species of gastropod}}
{{Speciesbox
| image = Phyllidiopsis cardinalis (Nudibranch).jpg
| image_caption = Phyllidiopsis cardinalis
| taxon = Phyllidiopsis cardinalis
| authority = Bergh, 1876
| synonyms =
Phyllidia tuberculata Risbec, 1928
}}
Phyllidiopsis cardinalis is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Phyllidiidae.