Mirage

I looked up Mirage on the Internet and it mentioned something about the "highway mirage". Highway mirage is when you see a pool of water on the road on hot sunny days. The water is not real but the shallow angle from the sky is reflected on the road and it makes us think as if the water is really there. This can be said to the movie we saw in class as the main character ( the robot ) sees water which later ,I thought that by the title ,meant that he was only dreaming when he saw it. It was weird though because the robot was in the sea surrounded by water and I wondered why the setting was not in some dry place such as deserts where water stands out more. I didnt understand what the whole process with the fish was about ( does anyone have an idea??) but may be what the movie was trying to say was that water is very precious and we should value it more. I thought that the fragile design of the robot really expressed that idea.