Both the half black mimic tang and lemonpeel mimic tang are actually the same species... Acanthurus pyroferous... the half black mimic tang has been erroneously referred to as Acanthurs chronixis for years, but they are the same species. Here's the kicker though... A. pyroferous mimics whatever species of Centropyge is in its range, and in the Marshall Islands where the half black/lemonpeel hybrid is VERY common, A. pyroferous actually mimics the hybrid! A. pyroferous also mimics the yellow angel Centropyge heraldi...