SEVERUM GOLD (Heros efasciatus)

Except when spawning, it’s fairly mild-mannered for a cichlid of this size. This makes it a good choice for a community of large, peaceful species. Ideally keep it with other South American species, such as

Some specimens can develop a nasty streak as they mature hwen maintained singly. In general this behaviour can almost always be prevented by keeping it in the company of conspecifics. There’s still a chance you may be unlucky and get a rogue individual, but the chances are much smaller when it’s maintained like this.

https://www.seriouslyfish.com/species/heros-efasciatus/