Actually off the coast of Santa Barbara County, Refugio State Beach there is a reef. It's not like the Great Barrier Reef, but it is still considered a reef. I've been diving off that coast several times and it's beatiful. A lot of lobster, abalone, leopard sharks, dolphins, sand dollars etc. Channel Island's National Park also has a reef. There's lots of Orange Garibaldi along the kelp beds and reefs. It's pretty cool to dive there, specially on a clear sunny day, you can see approx., 20-25' down into the water. June through mid October is the best time to dive in the aforementioned areas.