Most of the "weirder" reefsafe fish, i.e. ones that you rarely see or ones that dont look typical, are that way for a reason. Fish that arent in the hobby often are typically either expensive or very hard to keep, even some fish that are cheap are really hard to keep or shouldnt be kept. Also fish that dont have a typical shape, may not be "reef" fish at all and may adjust poorly to a brightly lit tank. Before you buy and fish you dont know much about, research as much as you can, not only aquarium sites, but check and other sites like fishbase.org