Are humbug damsels are aggressive

Answer 1

Yes and mo. As juvinikes, they are generally pretty passive and ca do well in a community tank. However, as they start to mature, they become super territorial and aggressive. I have a pair of humbugs that are actually getting donated to the LFS for rehoming today. In the last 4 weeks, they have killed or injured every other fish I've introduced to the tank. Including- 2 blue devil damsels that were twice their size (RIP), a 4" mandarin dragonet (RIP), and a yellow tang that is at least 4x their size (still alive bur minus large chunks of fin). Don't get me wrong, they are great little fish, just not suited to a community tank (I no longer patronize the fish store that gave me the horrible advice and sold them tp me, they have also given me bad advice with disasterous results in the past). So hopefully my wife's beautiful tang recovers, and I'm glad I found a new LFS where they actually know their rear end from a hole in the ground. Hope this helps.