I really hate to say it but if that is Marine Velvet, Put the fish down.
It wiped most of my fish out I tried all the meds. But then read up a little more on this and they say if you can see it, its to late.
Garlic and any Ich meds. along with moving temps. & lowering salinity do not work. the fish will hang in for about a week and then die. your pictures do look like Marine Velvet. As for Frogspawns and corals of this type some Clowns will go to them and some won't. My Clowns won't go near the Seabae Anenomie, Torch, Frog Spawn or Anchor coral. They have a power head hosting them when they are resting