Gabby says:
I believe that surfers or anyone working in a shark danger zone should carry with them some sort of electric stunt handgun that will work only underwater somehow.

Jim says:
Gabby-A much more realistic solution, that is indeed being considered in some danzer zones are shark repellent sprays such as the one sold by sharktecdefense.com

Pete says:
In the article, you mention about not having contrasting colors. Other articles & videos say that sharks are colorblind. (As/per Western Australian scientific research). With that being said, does color really matter? How about the contrasting black/white patterns that suggest to make sharks think that you are poisonous and not edible?

Adam says:
What about a little knife in a doob tube you could wear around your neck or wrist?