Yeah with a huge aquarium like all public aquariums have! The problem is that piranhas are so unpredictable that they may attack their tankmates at any time whenever it be a week or a month or a year later. Of course the tankmates that survived often carried scars that caused by the piranhas.It's true, it is very rare it will work. And from my own experience I would say don't do it. But my point was I have seen tanks online ( very few ) that have worked. I went to an aquarium in Majorca ( Spain ) and they had piranha, oscars, gar, flowerhorns, large catfish, and pleco's in the same tank. As I said better avoided but can be done.
Sent from my iPad using MonsterAquariaNetwork app