From the single picture, the spots appear to be along the lateral line. Do the spots look like small eruptions?
The fish appear thin vs. fat and happy. Are they eating well?(3-4 times a day)
Stress could be a cause, but not the effect of what you are showing in the pictures.
Do you have another larger clown in the tank?
Have you seen the fish getting chased around?
Fins would be torn, the fish would be hiding, scales would be missing, and the wounds would be bleeding at the early stage.
Is the tank a fairly new setup?
What size tank?
How frequent do you do partial water changes?
The only way the smaller of the two clowns in your picture could possibly be a issue for the larger clown; the larger clown is sick....Will the clownfish ever get along or will the smaller one just kill the large one?
The only way the smaller of the two clowns in your picture could possibly be a issue for the larger clown; the larger clown is sick.
Are the white "spots" still in the same position?
How long has the tank be set up?
I would carefully use a net, tongs, or if you are skilled a set of extra long cooking chopsticks.
Yes, feed your clowns a few times a day, especially if they are new arrivals, sick, or if you are attempting to breed them.