completely covered water body with algal bloom by cyanobacterial growth in uncontrolled fashion

abstract algae algal aquatic background biodiversity biology bloom blooming blue body brownish color compleatlet covered cyanobacteria cyanobacterial dangerous dead design detritus dilute dirty duck ecology ecosystem environment environmental fashion fertilizer floating flora formation formed green growth lake landscape natural nature organic outdoor overgrowth pattern plant polluted pollution pond reservoir river rock sewage slime slimy stone summer surface uncontrolled waste water