Did you know some vampires are weak to water? I had no idea this was a thing until very recently. It's often running water specifically, because of some holy mumbo jumbo about it or some such, but I thought that was pretty nifty. It's so often just a weakness to fire, that the weakness to water usually gets overlooked. Fish people on the other hand can usually move through water freely, and sometimes even have waterbending powers. And their watery nature often gives them a resistance to fire, as well. So what I'm saying is fish people are the best people. Should've been a fish man, Mr. Spooky!