Well, I'd say a sick shark would not be able to hunt efficiently, and would look for an easier meal. Any large shark that changes its feeding or migratory habits , or starts hanging around areas where humans gather , would be a bit suss.. It wouldn't have to be a SA shark, only the females migrate, apparantly. Our randy males stay at home, the other thing is sick sharks usually get eaten by healthy ones. Either way, sick or healthy, it wont get me, unless it comes up the bath plug. Bob

