Been in So. California for 60+ years and spent as much time in the water as I could; surfing, skin/scuba diving, fishing, boating, and just getting wet. I went to Catalina Island many times on my boat and fished/swam all around the island. I swam with blue sharks, but not on purpose. I cannot remember one shark attack locally. We've got big Blues, Leopard, Thrasher, and a rare Great White. I guess they just don't like those "left coast liberals"! I've been "attacked" by sea lions a few times though.