Why do red freshwater parrots turn black on the lips body fins it has been through 2medications do to my Oscar which died and it also does a lot of hiding but will attack hand when on glassim confused?

Parrot fish are a man made crossbreed. Not much is known about their breed specific ailments yet. Black Spot Disease, Ready to mate, water quality issue, changing color naturally as it matures, The black on your fish could be any one of these. Most of the time one or another of these will produce the markings and will not have an impact on the fishes behavior. You can attempt to medicate the tank if you want, if it is a disease parasite then Maracide would probably work best. It could also clear up on it's own. I would do a water change and test water quality first.