英文關鍵字
alga
algae
aquatic
background
biology
blue
bottom
bright
bubble
color
detail
ecology
environment
flora
freshwater
green
grow
growth
lake
landscape
life
light
moss
natural
nature
organic
outdoor
plant
pollution
pond
river
scene
scum
sea
seaweed
slime
spring
stream
summer
surface
swamp
texture
toxic
under
underwater
view
waste
water
weed
wet