Yeah, if he is the same kind I have I hope he will be okay by himself! 8" though thats big! Can't wait til mine get that size
Oh, and Orion if you pick up the issue of Aquarium fish(march I think) the one with the trigger fish on the outside, they have a big artical on a different kind of barracuda thats a live-bearer it sounds like the one you have. They are rare!!