not aggressive and don’t have a jaw structure that can w/ stand jaw locking. Think stocking them in a community tank is hard too. Can’t keep them w/ most large CAs and can’t keep w/ small ones because they’ll be eaten..
Agree, I kept the red morph in the late 80s, and when kept with other (even somewhat aggressive) cichlids, would frequently get their jaws dislocated.
I would need to snap the jaw back in place, gently between thumb and fore finger. So ended up giving my trio, a 6 ft tank of their own.
The males can reach 16"-18", so take that into account, they can also get spooked fairly easily, and injure themselves on tank sides.
In nature adults are usually found in deeper waters. sometimes a bit brackish, hard, pH high 7s to above 8.