Antiopella barbarensis, common name Santa Barbara janolus,Turgeon, D.; Quinn, J.F.; Bogan, A.E.; Coan, E.V.; Hochberg, F.G.; Lyons, W.G.; Mikkelsen, P.M.; Neves, R.J.; Roper, C.F.E.; Rosenberg, G.; Roth, B.; Scheltema, A.; Thompson, F.G.; Vecchione, M.; Williams, J.D. (1998). Common and scientific names of aquatic invertebrates from the United States and Canada: mollusks. 2nd ed. American Fisheries Society Special Publication, 26. American Fisheries Society: Bethesda, MD (USA). . IX, 526 + cd-rom pp. is a colourful sea slug, a cladobranch nudibranch, a marine gastropod mollusc in the family Janolidae.MolluscaBase (2019). MolluscaBase. Antiopella barbarensis (J. G. Cooper, 1863). Accessed on 2020-10-20.McDonald, Gary R. (2009). Nudibranch Systematic Index, second edition. Institute of Marine Sciences. UC Santa Cruz: Institute of Marine Sciences.Rudman, W.B., 2000 (June 29) Janolus barbarensis (Cooper, 1863). [In] Sea Slug Forum. Australian Museum, Sydney.
Distribution Antiopella barbarensis is a commonly found nudibranch on the Pacific coast inhabiting tide pools of La Jolla, California. Populations also expand to some parts of Costa Rica.
Behrens 1991 gives the distribution as "San Francisco Bay to Baja California, Gulf of California, Mexico".Behrens, David W. 1991. Pacific Coast Nudibranchs. Sea Challengers: Monterey, California.
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