I currently have a 200 gallon 183cm x 60cm x 70cm tank with a jaguar cichlid, a red terror and jack Dempsey. Ive had them a few months and they're all happy and healthy and it's fine but they're really skittish and they just freak out and smash around whenever there is movement in the room and they're just hurting themselves by doing this. They're not in a busy area they're left alone most of the day with plenty of hiding spots and they're all about 6 inches long. I really just want a bigger fish or a few bigger fish that aren't going to run from me whenever I try to look at them and one that will be pretty exciting and active and aggressive. I want to go for something a little bigger or the same but faster growing and I really need options. Being in Australia I have limited options but I just want to get a few ideas for something permanent in this tank whether it is a few big aggressive fish or just one big guy that owns the tank to himself.