Watercolor on paper
The fish is one of the aspects of the Ying Yang. It is the symbol of the duality of everything that exists in the Universe, the fundamental forces, opposite and complementary, that are found in all things that are born from heaven and earth.
When the fish looks up it sees everything blue, when it looks down it sees everything blue. That is why it lives right in the center, it is the center where all things come together, the heart.
The four opposing fish is a symbol of the duality within each one when it observes the duality of the other, it is the meeting of two aspects, masculine and feminine, each one with its two internal opposites