The white spots on the gills, pectorals (front fins) and above the eyes are all perfectly normal! It just indicates you have a sexually mature male oranda. Nothing to be concerned about and you may see the spots come and go on their own though some males will always have them. Just keep an eye on him for any signs of aggression and/or breeding behaviors as its sometimes necessary to separate males to prevent injury to other fish.
Unfortunately, your attachments did not link but as long as you are staying on top of your water changes (I would personally up the size and frequency), things should be fine. If you have any questions,do not hesitate to ask!