Yes. Sorry, can't just say one word. They're like damsels. They will fight each other if they are of similar shape and size, but if you can occupy them with more than 1 (I used to have a coral beauty, a lemon peel, a potters, a shepards, a flame, a key hole, and an eeblei together with an established pecking order in a 125) you can occupy them so they don't kill each other. Sometimes...