The Purpose of Fish In The Aquarium

Philippines
October 29, 2011 4:17am CST
What is the purpose of fish in the aquarium? I have seen owners who have pets like fish, but I do not know what there purpose is. I know dog can help guard the owner and cat helps chase the mouse, but fish -- well -- they just stay inside the aquarium with water on it and swimming all around inside the aquarium. Staring at them for how many hours just in the aquarium makes me fall asleep as I could not touch him or anything that I want to do with the fish. Is a pet fish just a display so that the house become colorful or there is a meaning on it if having a pet fish inside the house?