Very cool, good luck with him.
Just as a heads up, if he does not take frozen food at first, your best bet is gut-loaded ghost shrimp. Do not use freshwater feeder fish, no matter what anyone tells you. This is very harmful to the lionfish.
im trying to figure out how to get pics off my camera (ive said it oncer and ill say it again) and i no not to feed them freshwater, my friend lost 3 lions to freshwater feeders, u would think on the first time around they woulda learned