Okay, here goes...
Killer whales and sharks don’t get along.
Sharks have a great sense of smell.
Get Orka blubber, distill it down, make a spray like deet, and viola no more shark attacks.
I will say that since I’m the inventor, I will ask for volunteers to test the concoction.
5.56mm
Just don’t get orca blubber from a female that was in heat...just sayin’!