Hrm.... I haven't spied one recently, then. Sorry.
Good luck finding it. If you don't, you could always steer him or her towards the Pocket Guide to Marine Fishes by Scott Michael. It's not a complete guide, but it's a handy-dandy thing for new and experienced hobbyists alike to keep as a quick reference at the LFS. That, and most LFSs have a shelf copy you can.... er.... borrow... while browsing to look up stuff.