Time lapse of swirling bubbles of white foam, drifting and floating on the surface of water in a Scottish river in a constantly changing pattern of organic shapes

stream river esk fresh water north esk dissolved organic carbon ripple water reflection flowing whitewater river froth bubbles flow swirling foamy fishing bubble turbulent surface foam pollution floating float time lapse spume shifting surge foaming patterns movement spiral circulate swirl carbon whirl detergents contrast change drift twist salmon organic dark fast current white black eddy