I bought it about a week ago from a petstore who got it in by trade. So I'm not really sure if it was by itself or in with others. It was however in a tank with a large s/a cichlid. I have a few oscars and an arowanna growing out I'm hoping can go in with the clown. But as for another fish I was looking at bichirs since I wanted another oddball. But I'm not sure how big it would have to be or if there is a species that would hold its own better then another.