evolust, that was a bit excessive....at least he asked ahead of time.
That said....Keto: NO, don't do it.
Keto: If you have already purchased him, contact your nearest public aquarium (or the GA Aquarium) to donate the fish. If its over 4' you may get a tax credit...
Take the money you'd spend on the tank and shark and spend it visiting a public aquarium or see if you can get a "behind the scenes" tour. (some places offer them for uber passionate hobbyists/people who work w' fish, etc) You'll hopefully see some cool stuff and get an appreciation for why what you proposed wasn't a good idea.