You can observe many fish and creatures
from the Under Water Observation Room of Chitose River!

We've observed 33 fish and other creatures such as mamals, waterfowls, aquatic insects, etc. from here since 1995. Juvenile salmon in spring, a group of Japanese dace and various fish in summer, adult returning salmon in autumn, then salmon spawning and waterfowls diving in winter. We feel the four seasons changing through creatures.

Fish & creatures observed from the Underwater Observation Room of Chitose River
Lethenteron japonicum Arctic lamprey	Lethenteron reissneri Far eastern brook lamprey	ammocoetes	Hypomesus transpacificus nipponesis Wakasagi	Plecoglossus altivelis altivelis Ayu
Salvelinus malma malma Dolly Varden	Salvelinus leucomaenis White-spotted charr	Salmo trutta Brown trout	Oncorhynchus mykiss Rainbow trout	Oncorhynchus masou masou Masu salmon ;Juveniles
Oncorhynchus masou masou Yamame; freshwater type of Masu salmon	Oncorhynchus masou masou Masu salmon;adults	Oncorhynchus masou masou Spawning color of Masu salmon	Oncorhynchus keta Chum salmon ;Juveniles	Oncorhynchus keta Chum salmon ;adults
Oncorhynchus nerka Kokanee; land-locked form of Sockeye salmon	Oncorhynchus gorbuscha Pink salmon ;adults	Tribolodon hakonensis Japanese dace	Tribolodon ezoe Ezo-ugui	Tribolodon brandti Pacific redfin
Phoxinus percnurus sachalinensis Yachi ugui	Pseudorasbora parva Stone moroko	Cyprinus carpio Common carp	Carassius gibelio langsdorfi Crusian carp	Gold fish
Rhodeus ocellatus ocellatus Rosy bitterling	Gnathopogon caerulescens Tamoroko	Misgurnus anguillicaudatus Oriental weatherfish	Noemacheilus barbatulus Stone loach	Silurus asotus Amur catfish
Gasterosteus aculeatus aculeatus Three-spined stickleback	Pungitius tymensis Sakhalin stickleback	Pungitius pungitius pungitius Ninespine stickleback	Rhinogobius sp. OR Goby	Chaenogobius laevis Juzukakehaze
Chaenogobius urotaenia Ukigori	Cottus nozawae Hana-kajika	Platichthys stellatus Starry flounder		Homo sapiens Human(diver)
Mustela vison Mink	Mergus merganser Common Merganser	Aythya fuligula Tufted Duck	Bucephala clangula Common Goldeneye	Anas platyrhynchos platyrhynchos Mallard
Palaemon paucidens Freshwater prawn	Semisulcospira libertina Marsh snail	Margaritifera laevis Freshwater pearl mussle	Epeorus latifolium Mayfly larva	Midge larvae
*All photos taken in the Underwater Observation Room