It is genrally not a good idea to try and find out how to kill something that will kill you if you try to kill it. You have been warned.
The mighty Rocket Shark has only one weakness, yet, the Sharks have killed everyone that has everyfound out the secret. Anyone who could find this weakness and stay alive would instanly become the most powerful person on the planet. Nuff Said.
For the safety of yourself and others around you, do NOT anger the Rocket Sharks by even thinking of maybe ever possibly trying to find the Rocket Shark's hidden weakness.