Why do you think Hemingway introduces tourists at the end of the novel and has them comment upon the marlin's skeleton?

The female tourist at the end of the book represents the feminine incapacity to appreciate Santiago's masculine quest. For her, the marlin skeleton, a phallic symbol, is just "garbage waiting to go out with the tide" (127). She does not speak the waiter and Santiago's language, and so is ignorant of the old man's great deeds. Her misunderstanding is simple enough, but the fact that she is the only actual female character in the novel and that this episode appears on the last page gives it added significance.