I guess SM asked that before, although B's answer didn't technically rule out a particular variety of melon. But all the ones I can think of are eaten in fruit salads or cooked (winter melon, for example). I'm struggling to think of something (always?) eaten raw but not included in a fruit salad...
[CdM] Why, yes, it does include those letters. (Glad someone noticed the clue.) BTW I ruled out fruit salads because theoretically tomatoes could be used therein. Let's say if you buy fruit salad from a shop you won't find this in it.