amphibian
animal
anodonta woodiana
aquatic
aquatic insect
aquatic plants
ayu
ayu fish
bug
carp
catfish
collection
crawfish
crayfish
cybister japonicus
diving beetle
dragonfly larva
dragonfly naiad
duck
fish
freshwater crab
freshwater fish
giant salamander
giant water bug
goldfish
japanese freshwater crab
japanese rice fish
killifish
loach
natural
nature
newt
oncorhynchus masou
river
river animal
river snails
set
sweetfish
turtle
water scorpion
water strider
weather loach
weatherfish
wild life