A time-lapse of foam bubbles floating on the surface of the North Esk river while slowly lapping against the river bank

river bank stream fresh water froth fastflowing flowing river ripple water whitewater tide foamy foam pollution churn spume turbulent foaming surface lapping flow moss surge carbon float shifting white cold bubbles swirl time lapse contrast circulate whirl floating movement salmon bubble drift fishing twist organic patterns change fast current black eddy lap