Watch the wrasse carefull over the next few days/week. I'm not sure this is C. irritans given that latest photo. Again unless a trick of the light/blurriness, it appears the spots are somewhat elongated which could suggest a possible trematode problem. It would explain some of the other symptoms but there is a lack of redness which usually accompanies the parasite.
Keep the QT
up and ready for whatever the case may be. If C. irritans becomes evident, treat in the QT
with hyposalinity. If trematode 45 min SW
formalin baths every 3rd day for a total of three times.