Disregard my other posts. I stumbled upon some other pics of this beauty on your image hosting site. Truely awesome collection you had on there and after reviewing those other pic's it looks to be 12-14" probably.
shovelnose pimoled type species have been known to go through bizarre color changes both temporary and permanent due to unknown variables. a buddy of mine had a normal tsn that turned completely white over the course of a few weeks...
anyways, great fish there. looks almost like a platinum tig!