Sharks are hard to farm, in that they have all the problems tigers have, but you also have to do it underwater. I also think sharks aren't as in demand as tigers. I've heard tiger meat is a popular snake oil. Or at least stuff that claims to contain tiger meat is.
In Australia, fish'n'chips is almost certainly shark.
r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.