I wouldn't take the chance...Over the 15 years I had him, my black pirhanna 'Jaws' was housed with a variaty of tankmates (mostly when he was younger) and even though he got along with them all for a time eventually they all became dinner. He did have a female midas cichlid that he was devoted to and lived with for 12 of those 15 years but I concider that a rare exception.