Gulenia monicae is a species of sea slug, an aeolid nudibranch, a marine heterobranch mollusc in the family Flabellinidae.

[2] Gulenia monicae was described from specimens collected at 10–30 m depth at Gulen Dive Centre, Norway, Atlantic Ocean, 60°57′28″N 5°07′42″E / 60.9578°N 5.1284°E / 60.9578; 5.1284.