Kisito said:
The movie is very beautiful. To be few that the movie is spiritual, but I didn't find... I think that the movie arises from a story really, that the young man had had to be shipwrecked with a cook, a sailor and her mother, and that they had to be eatable to survive. The young man was the only survivor. To repulse the atrocities that he saw and that he made, he invented a fantasy story with of animals... The survival deprives us any humanity.
Interesting Kisto. I think the movie was portrayed in that way so that we as viewers decide which version of Pi's story we want to believe actually happened.
Perhaps it was a combination of both stories, perhaps not. I chose to think about the animal story, because of several things I picked up in the movie.
SPOILERS:
I thought that in the end Pi was telling the Japanese men only what they wanted to hear. Several people argue that the "human version" of the story was what actually happened because of the pain on Pi's face as he described the events. But I think anyone would have pain on their face if they had to take back what was true to them, and to lie to others for their benefit because they just can't 'go there'.
To me the movie was about God and whether or not you choose to except that there is a higher power that at some extent guides you, or you purely believe what you can see/touch. This was also presented as Pi's father and his belief that science was the true God, because "it had done more for humanity in 100 years than religion had over thousands of years."
So Pi used a combination of these things to survive on that boat. He used science to survive sharing a boat with a predator (making the attached raft and the little instruction manual he was reading) and he used spirituality/faith/God to survive as well (the island/seeing the universe within the ocean and stars and how all was essentially one and part of God).
Pi's dad had an argument with him that the soul of the animal is your own soul staring back at you, but Pi believed differently. He believed the animals did have souls. So Richard Parker could really have been a tiger and he did have a soul. To me this was shown when Richard Parker was looking at the stars and Pi asked him what he was looking at, "what can you see?".
Another interpretation could be that Richard Parker represented the predator mind. The predator mind can be cunning, intelligent and can consume us if we don't stay one step ahead of it and the life-boat represented life itself. At one point Pi said something along the lines of "I knew I couldn't tame Richard Parker, but maybe I could train him."
Fwiw, there is this article that tries to put the ending into some perspective, although it also states that the ending is ultimately up to the viewer's interpretation.
_http://screenrant.com/life-of-pi-movie-ending-spoilers/