First of all the moment I saw the movie I thought the movie's robot looked like this music video from Bjork called "All Is Full Of Love". Everyone CHECK IT OUT!!!
http://www.youtube.com/watch?v=EjAoBKagWQA
The story from my point of view was that in order to survive,we need to make sacrifices. Especially for this robot it seemed like it needed fresh water, and it is a very limited source compared to the sea water. After showing the sacrifice, the robot put the fish into him and made it come back to life. Maybe this was something where the director wanted us to think of the different ways we might find to live with other species, and also rethink of what we humans are doing to the environment.
