Harlequin tusk with large white blister like spots

[dirk_brijs]

Can anyone tell me what those white spots are on the side of his head (only one side of the fish is effected) and some spots on the same side fin.
They are too large spots to be Ich I believe. (or not?)
Could those be blister like spots from getting in contact with a carpet anemone?

 

[Whiterabbitrage]

Looks like Lymphocytis to me...

 

[Dmorty217]

Looks like Lymphocytis to me...

This. Only known treatment is great water quality and a varied, enriched diet. Could take months to go away