Give me a break...that was nuts, crazy, and unnecessary.
First, while I give kudos to his balls being bigger than his brains, he did say it was injured, so we have no idea how badly and what that did to the capabilities of the shark.
Second, it was confined, it could not do its normal attack routine.
Third, why kill the shark? The net was already screwed up...are tuna that damn important that they could not cut the net and let the shark out? Even the guy admits it is an endangered animal. Hell the only reason the shark could have made him "extinct" was because he jumped into the stupid net with the shark.
I find it disgusting and a shame.