I bought a supposed mated pair of Maroon Clowns (on-line), needless to say they weren't mated, and after receipt I don't think they are both Maroon's (remember I color blind)!
Anyway, one is hosting in a giant Brain, the other is hosting in my giant polyps. The small one (hosting in the polyps) is so territorial, that whenever I stick my hand in the tank he attacks it. He is no nicer to the large (true Maroon). No love is lost between them. I would like to get them out of the tank, but shudder at the thought.