A koi fish swims in clear water with sun shining down.
A top-down, close-up view of a koi fish with gray patches in clear water with a sand bottom. It is facing to the right. The sun is shining on it, and the sand under it. There are small bubbles in the water around the fish in the front. There is a small dried leaf on the bottom left and part of one on the right, just past the fish's head. A shadow on the sand in front of the side of the fish is visible.