Mind me saying this, but those are just dyed fish.... ie they take the poorest quality pink parrot fish and dip them into a dye which eats into their skin. The colour will eventually fade off in a month or 2 after u buy them and u'll end up with just white/pink coloured parrot fish.

Now this I cannot understand... why would someone buy a dyed/artificially coloured fish? The natural colour of these parrot fish are pink to red. Good quality fish are red (fed with plenty of carotene foods), poor quality fish are pink (and u can feed all the carotene foods and the colour won't go very red.)..... any other colour, just get some food dye and colour the fish yourself.