I found Fish Bones in Off Tour in Avalon cache (GC4472). Don't know how it got there, but if I'd know about the diving thing, I could've taken a picture with my friends, Lil Kim and DevildogLT, who were with me on Catalina Island. They did a little bit of snorkeling in the bay while we were there - and said the diving was wonderful! I'll drop it locally soon!