I picked six pirayas. They are by far my favorite pygos. Nothing beats a piraya with beautiful flames. You should get them small and watch them grow. If they need more room, you could always sell one or two.HIGH PSI said:Getting a 125g or larger fish tank, don't know what type of Pirhana to put in there. Was going to go with a Serra fish, but I like the Shoal idea better. What would work, what would you put in the tank?