If you look real close, see if he is missing those scales. If it's not raised nor fuzzy, then most likely candidate is missing scales. Which could of happened during the move, or prior from a decoration or a roughly used net.
Keep an eye on it, stress coat will be helpful since it protects the slime coat. It may heal in time or it may have lost those scales previously and they grew back a different color. I wouldn't stress right now about it too much until you see him behaving odd/sick or it grows in size/texture.
I am in love with that little guy lol