In an aquarium in Kitami City, Hokkaido, which recreates the bottom of a frozen river, a keeper wearing diving clothes went into cold water to perform cleaning work.
At the "Northern Daichi Aquarium" in Rubeshibe-cho, Kitami City, an aquarium that reproduces the bottom of a frozen river, which is rare in Japan, is installed outdoors to observe the ecology of yamame trout and rainbow trout during the winter. can do.
On the 8th, cleaning work was carried out from 10 am to remove dirt from the aquarium, and after cutting about 10 cm thick ice on the surface of the aquarium with an electric saw, a keeper wearing diving clothes dived inside. I did.
Since the water temperature in the aquarium is as low as 1 degree, the time to dive is limited to 30 minutes, so the keeper quickly removed dirt such as moss using a sponge while sticking to the glass with a suction cup.
The frozen aquarium is cleaned about once a season, so the keeper, Chinatsu Nukido, who was in charge of the cleaning work for the first time, said, "It was difficult to balance in a small aquarium. I want you to enjoy watching the fish. "
The aquarium that reproduces the frozen river under the "Northern Daichi Aquarium" can be seen until around the 20th of this month.