That is not what is commonly refered to as a freshwater lionfish. "freshwater lions" are actually a type of reef Toadfish that also lives in estuaries where it can venture into full fresh water. Forgot the sci. name.
My LFS had 3 of them for $5.99 each, I bought two as one had a red sore on it's face, well within a week both of mine had the red sore and they passed on. I really miss them as it was an awesome fish to own, I've been looking all over for another but can't seem to find one.
Will do, here are a couple pics, you can see the red sore on the tail in the first pic. They were truly in awesome fish. I did find one place with them but they need a minimum order of $50, the fish is only like $5 though, don't need 10 of these guys.