The following is by no means a complete listing of the species of opisthobranch mollusks from the waters of California. These are simply some of the animals we happened to see on our limited number of dives primarily around the islands of Anacapa, Santa Cruz, Santa Rosa, and San Miguel. There are other web sites that cover all these species in much greater depth. In particular, Mike Miller's Slug Site and the Australian Museum's Sea Slug Forum by Bill Rudman have all of these species and many more. There is also printed literature available on these wonderful creatures; the premiere reference on California nudibranchs was David Behrens' Pacific Coast Nudibranchs, now expanded to Nudibranchs and Sea Slugs of the Eastern Pacific by David Behrens, Alicia Hermosillo, Karin Fletcher and Gregory Jensen..
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