WEST PALM BEACH — For the week leading up to that day in April, Marlin Wakeman and his friends had joked about what would happen if one of them fell into the shark-infested waters at the Bahamas marina. At any given moment, he said, there were easily 20 sharks waiting, trained to respond to any splash that might mean food, so many that “you can walk on their heads.”
So it was almost as if the group had willed it into existence when, one day, Wakeman was preparing to jump the three feet...