I agree with the others here that fighting a shark with a knife is 100% STUPID!
BUT.....if you had to, for whatever reason, I would choose a strong icepick (one that floats would be even better).
I have never fought a shark but I have caught, skinned, and eaten sharks. The skin is very tough to cut but an icepick can puncture the skin fairly easily.
And when you're not shark-fighting, you can break the ice for margaritas!
Good luck,
Allen.
BUT.....if you had to, for whatever reason, I would choose a strong icepick (one that floats would be even better).
I have never fought a shark but I have caught, skinned, and eaten sharks. The skin is very tough to cut but an icepick can puncture the skin fairly easily.
And when you're not shark-fighting, you can break the ice for margaritas!
Good luck,
Allen.