While I'm certainly no expert regarding any of the numerous species of sunfish, I'm also a member of NANFA, and have read the exact opposite, there, and here on MFK, about tropical temps and how it can affect certain species of sunfish. I also grew up in sunfish/bass country, and that info matched my personal experience. Even in Florida the water can drop down into the 60"s in the winter months, yes? I'm really not interested in getting into a debate about keeping native species year round at tropical temps, I was just offering my perspective on why I personally wouldn't keep the different species in the same tank.