Peeling apples on Shabbos

Hi,

One may peel apples right before eating them; similarly, one may remove the skin from fish right before eating it. This must be done right before eating; although the peel and skin are edible, one's intent is to dispose of them.

That which is inedible, such as an eggshell, has the same rules as a skin one does not intend to eat.

One may remove the skin from chicken long before serving/eating, though; the skin is considered part of the chicken itself, despite one's intent.

(Rav Moshe Feinstein, Igrot Moshe Orach Chaim 4:74:Boreir 8)

Have a great day,
Mordechai