When I as a kid my dad used to keep them. I remember bubble nests. And spitting babies back into the bubbles. But I don't remember if they are aggressive to other fish. Or the female? Do you know how many females to a male, Gill? If he nests do I need to take her out if the tank?Yes they are a communal fish and need others of their kind to feel at home. And then you will see them interacting with their environment. And feeling things out as they swim about.