i put a godlfish in with my cichlids, and im talking SEVERUM, rainbow cichlid and an appisto. these are weak peaceful fish, they ripped all the scales off of the goldfish. even the non cichlids were attacking it. goldfish are slow and like to rest, most tropical fish are fast and like to move around, the goldfish can't keep away from them as much as they would eachother and they get beaten up.