There are places in St. Andrew Bay where you would swear a lot of tiny fish are tasting you while you are wading and still very much alive....but they don't hurt anything....they just tickle.
I assisted in retrieving two pilots that died when their jet crashed in Mobile Bay in 1975. Their bodies had been in the bay less than 12 hours and the crabs had already stripped the skin and flesh from all of the exposed tissue. Pretty gruesome.