That is about as classic a case of Uronema as you'll see. Newly acquired wrasses often develop this. The problem is that the protozoans develop intercellularly, so by the time they erupt on the fish's skin, the disease is quite far advanced.
That said, without putting a skin scrape under a microscope, you can't be 100% certain, AND bacterial infections sometimes develop in conjunction with Uronema.
The only real treatment that works in some cases is chloroquine. Luckily, unless you just bought a bunch of chomis, anthias and wrasses, it is unlikely to spread to your other fish.
Bill