英文關鍵字
acipenser
animal
aquarium
atlantic
background
beluga
big
breeding
catching
collecting
deep
endangered
european
farm
fish
fishes
fishing
food
fresh
freshwater
fry
glanis
grill
grown
guldenstadti
incubator
lake
natural
nature
net
oxygen
piscine
plant
pool
population
reservoir
river
rural
russian
sieve
sterlet
stone
sturgeon
underwater
water
white
wild
wildlife