I would imagine that they really dont care too much. If you go in and buy a fish, they may loose money, but while you are there, maybe you will get a new CD or something like that. Also, the rent for a fish store is huge, where walmart easily makes rent anyway, so adding a pets section dosnet really affect them too much. Walmart can also buy in MUCH bigger bulk, so prices are lower, and also, there is usually only one employee so they can keep their cost low. From another post it sounds like you were getting new tires at walmart, that is why you were looking at fish. If they make tons of profit on your tires, they can cut you a deal on fish. They profit, your happy, and come back again.