Wow, guess I can't post the pics from those particular sites.
Just google Zebrasoma Tricolor. It's an abberant or hybrid tang.
wowthere's a lfs here that had one of these in the other day - called it a "calico purple tang". They wanted $130 for it and it was a good size animal, but i've never seen a fish's gills move so fast in my life as it lay on it's side on the bottom. This lfs is so bad, that their own employees placed bets as to how long the fish would last...