The good thing about buying a fish from Wal Mart is that it comes almost dead for you,you don't have to become attatched to the fish because it probobly won't live for more than a week. My deal with Wal Mart selling fish isn't that they are incorrect, (I intern in an aquarium and when you step into the public area all you hear is parents telling there kids that a clown fish is really a nemo fish and a sandbar shark is a great white shark), but they simply do not care. Whenever I go to a Wal Mart that carries fish I make it a priority to make sure the fish have at least been fed. Sometimes I will quickly grab some feader fish and put them into the oscar tanks. I have been tempted to ask if i could clean the tanks.