Yep. Americans are similar, except you can't overstock for aggression. I mean, you can, but all you're really doing is spreading the damage. Mine get feisty during breeding, but nothing too bad. A lot of bickering, not bloodbath. Mine are semi-aggresive, and mostly central American. I have a South American, regular blue Acara, named Atari, in the community tank. Keeps to itself and is the peace keeper of the tank.They can definitely be aggressive assholes, but they have the most personality of any fish I think I've ever encountered. I had to keep them slightly overstocked to spread the aggression out and remove any one who was too over the top aggressive but it worked out really well just had to do more frequent water changes on those tanks.