My experience with the open water at SB:
At CC-SB, DW is on a raft about 20 yards out, I take the camera and start walking out to take her picture. I see all the little fishes scatter, look around and see a 2-3 foot Black Tip Shark swimming around. DW is using her hands to move the raft creating small splashes. The shark turns toward her, I tell DW to stop cause I see a shark. What does DW do? She jumps off the raft causing a bigger splash! I have to run to get between her and the shark.