It's new to me. All the real GWS action has been in South Africa where people are being eaten.
Whatever. You would have found your story already posted if you had searched, "shark."
GWS attacks around the U.S. coasts don't equal South African standards. The worst single GWS episode in American history was in 1916 off the New Jersey coast and that was the series of attacks that the first "Jaws" movie (1975) was based on. And it was caused by just one rogue GWS that apparently got ambitious.