Hard to tell from the picture. I agree that it's probably not ich because a few spots are too big to be ich. If it's my fish, I would give it a fresh water bath. If those things are parasites, they will fall out. If we can confirm they are parasites, we can use proper medicine to treat it.
My fresh water protocol is a bucket of fresh water with temperature matching the DT as close as possible, PH matching the DT as close as possible (using baked baking soda). an airstone or a small power-head is good if you have one. Put the fish in the bucket for 5-10 minutes.
Good luck and please let me know the results.
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