The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
Could also be melanism. Watch for changes in the "spots" location. They should have a somewhat symetrical shape if Turbellarians. Melanism is common in clowns which is a skin discoloration. It is somethimes the result of poor feeding or environment but not always. It is even more common it hosting or paired clowns.