algae

aquatic

background

blurred

closeup

container

contaminated

contamination

cyanobacteria

danger

dangerous

dirty

disaster

ecological

ecology

ecosystem

environment

environmental

exterior

flora

green

hand

hold

infest

liquid

natural

nature

organic

outdoors

plankton

plant

polluted

pollution

problem

research

river

sewage

shake

slightly

slimy

stir

summer

swamp

texture

toxic

waste

water