To be perfectly honest, the animation was not for me...lol
Anyways, the robot, which was a symbol of humans, had a very weak structure which I presume it represented the weakness the human race. Yet at the end, the robot cut open the balloon? and realized what he had done to the fish. I guessed this meant that humans, though they are weak, have the power to realize the feelings of others. After that, he saves the fish and they both end up in an endless body of water (most likely the ocean). This was a symbol of peace and harmony which can be obtained by the thoughts for others.
