Diaphoreolis lagunae, common name orange-face cuthona, is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Trinchesiidae.[1]
This species has been recorded along the Eastern Pacific coastline of North America from Curry County, Oregon, United States to Bahía Tortugas, Mulegé Municipality, Baja California, Mexico.[2]
Diaphoreolis lagunae feeds on the hydroid Sertularella turgida, family Sertulariidae.[3]