Corruptobranchus sanjuanensis is a species of sea slug or nudibranch, a marine gastropod mollusc in the family Eubranchidae.Bouchet, P.; Piction, B. (2026). Corruptobranchus sanjuanensis Roller, 1972. In: MolluscaBase (2025). Accessed through: World Register of Marine Species on 2026-04-18.
Distribution This species was described from Friday Harbour, San Juan Island, Washington. It is reported as far north as Mountain Point, Ketchikan, Alaska.Behrens, D. W., & Hermosillo, A. (2005) Eastern Pacific nudibranchs, a guide to the opisthobranchs from Alaska to Central America. vi + 137 pp., 314 photos. Sea Challengers, Monterey, California, page 112. It is reported to be fairly common in British Columbia, Canada in two colour forms.Rudman, W.B., 2000 (June 11) Eubranchus sanjuanensis Roller, 1972. [In] Sea Slug Forum. Australian Museum, Sydney. It has also been reported from Cobscook Bay on the Atlantic coast of North America.Trott, T. J. (2004). Cobscook Bay inventory: a historical checklist of marine invertebrates spanning 162 years. Northeastern Naturalist. 11, 261-324.
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