Dead Fish

Wal-Mart shouldn't be selling living things. When they sometimes sell cacti and succulents, those usually look in really bad shape too, and those don't even usually require much attention.

Yeah, it's "just fish", but I would call everyone that others above listed and get that taken care of. I'd call Wal-Mart corporate too. If for NO other reason, just because kids probably go to look at those, and that wouldn't be a happy experience for them.