I've heard of one living to 40 or 30 in captivity... they say in the wild, it's around 50 years. Below is a story about one that lived to 43, but I don't know if I'm buying it considering he's not much bigger than my pac and weighs approximately the same. But who knows...
http://today.msnbc.msn.com/id/35787.../t/not-fish-tale-pet-pacu-buttkiss-years-old/
http://today.msnbc.msn.com/id/35787.../t/not-fish-tale-pet-pacu-buttkiss-years-old/
