Yeah, I've been ridin the Delta for years and have seen all kinds of rashes, diseases, infections, brown logs, and of course Sea Lions. Point is, not a good place for being in the water. Please don't go there/here.
Funny, most of those comments are true, but it wont stop people from comming to the delta when they can board on conditions like the picture above. just wear a wetsuit a like stewart said rinse off immediately and dont drink the water!