With everyone's comments and concerns about the color and the UTH I'm starting to question if if it's shed... Because if it is a burn I shouldn't have any water in there, right? But I've been checking on him and there's no blistering. But this one scale is concerning me...

Updated pictures:
http://imgur.com/LymCbZH
http://imgur.com/uWddYxL
http://imgur.com/0iwFqre

Concerning Scale:
http://imgur.com/WRMSWK9