x2. Give him a warm bath for a couple of hours and see if anything is floating around in the water. Do what Joe suggested. If you have him housed near any snakes I recommend putting him in quarantine for now until your 100% sure he doesn't have mites.
Also, I would like to say that you should post links of other people's photos besides showing them on here. If this image is on your account on a website like Photobucket please post the link.