英文關鍵字
africa
african
amphibius
animal
animals
aquatic
background
big
brown
captive
close
closeup
common
cute
danger
dangerous
face
fat
fauna
head
herbivore
herbivorous
hippo
hippopotamus
huge
mammal
motion
natural
nature
outdoor
park
protected
reserve
safari
semiaquatic
slow
slowmotion
south
submerged
surface
swamp
travel
up
waliking
walk
water
wet
zoo
zoological