In a small aquarium with small inhabitants, that species of dottyback might get a little over-aggressive towards his tankmates. Other dottys are less aggressive than that one, but the two types of purple/yellow dottys dont always play nice with others
Agreed. Damsels are probably even more aggressive than the Dottys. I'd consider a small wrasse (fairy/flasher), some fancy gobies, firefish, or perhaps a springer psuedochromis "Pseudochromis Springeri" if you like the dottybacks.