well i am not so sure but i have 4 largemouth bass in a 55 gallon tank right now, i plan on putting them in my 125 later. They seem to be doing fine. I plan on building a lot bigger tank in the spring. That is my plan to see if they will breed. I have had them for a little over a month. I would not recommend trying to keep these fish unless you can feed them. They are about 3 1/2in. and i spend $20 a month to feed them right now. I have a few breeding sets of convicts to help me out, cause it will get expendsive. So i will let you know how they do.