Koi fish is thought to be one of the most common species regards fish that may be grown inside a house in an aquarium. The main reason referred to explaining their popularity is that the look really interesting. The way a fish looks is in general one of the most influential factor contributing to our move. It is proved by the fact that the more beautiful our fish are, the more satisfaction we have from observing them. Just analyzing how do the fishes behave inside an aquarium might help us better relax and calm ourselves efficiently.