Their not always as bad as people make them out to be. I've had the same 5 in my 55 for over 2 years and they have never bothered anyone except each other Without damage just friendly chases.That's annoying. I was told it was a red phantom. Serpae are aggressive.. right I don't think I'll pick any more of these up if that's the case. He's in with guppies but hasn't done anything yet.