Slime coat problem on wrasse

[Rory]

Hi all, I am trying to figure out what is wrong with this wrasse. I noticed a hazey / flakey sheen on this fish a little while ago and it hasn't got any better. It has been fed mysys and brine shrimp as a staple with the odd feeding of nls pellets. It has since got worse and its colors are faded. It has been in a qt tank with a Randal's anthias for quite some time, with both fish eating well. The anthias has nice coloring and both are active, but the wrasse is now noticeabley less active than usual. I have scoured the web trying to id what is going on, whether it's nutrition, fungus or parasite, but to no avail. Hopefully someone can help steer me into the right direction. Hopefully these pictures are clear enough.