environmental
algae
background
biology
blooming
bluegreen algae
close
color
contaminated
danger
deficiency
detail
dirt
dirty
drainage
e
ecology
environment
flora
green
green scum
green water
lack of oxygen
lake
marsh
mud
natural
nature
ocean
organism
oxygen
oxygen deficiency
pattern
phytoplankton bloom
plankton bloom
plant
polluted
pollution
pond
red tide
river
scarcity of oxygen
scum
slime
surface
swamp
water
water bloom
water blooming
wet