Sometimes there are too many spear divers and my great white dies in a second, I suggest something like a armour vest that reduces torpedo, bullet, missile and spear damage. There will still be some damage though.
They can be used to damage and stun helicopters and subs.
Do something like europa and have alien civilisations and sharks
Lord Crusher(cybernetic megalodon). Having suffered extensive injuries because of a submarine, scientists recounstructed the body of this perfect shark into a mechanical killer. Full body armour protects it from mines, torpedoes, missiles, bullets and spears. A built in laser cannon as well as a missile launcher enables ultimate stunning for both prey and machines. It can eat entire subs in a single go and has a built in jet engine.