I'm having trouble thinking of what group he would fall under, if any at all. In my mind he would seem to easily tempered or aggressive for most order's to bare. If anything, he would of been found early as a youngling and brought to the Jedi, only to be denied acceptance. I was thinking that he could just be a force sensitive shark-man bodyguard or hired jaw who needs refuge. Maybe a little brute force to balance out the zen and mysticism of Jedi outcasts and monks.
Pretty interested. Never really put much thought in making a force-user, but it's always good to crawl out of my comfort zone sometimes. There was a shark species from the Clone Wars cartoon that would be interesting to work with.