I have taken these pictures in Chindia Park in my town. There is a small lake there. One day Isaw, for the first time, a shol of fish that swim in a circle on surface of the lake. There are not many fish in the lake and that’s why I was surprised to see they grouped. Anyway I stayed there and looked at them. It was a beautiful show.
There was a strict discipline in the shoals of fish: all individuals swim in the same direction, their movements are coordinated, none of them try to overcome or stay behind