The Tokyo Games were postponed 10 months ago at the outbreak of the coronavirus pandemic, and now the event appears threatened again.
Tokyo's coronavirus-closed Sumida Aquarium said the little eels have started burrowing into the sand when staffers come by to check on them.
Japanese Prime Minister Shinzo Abe and the International Olympic Committee agreed to postpone the Summer Games in Tokyo because of the coronavirus.
An International Olympic Committee official said the 2020 Olympics will be postponed due to the coronavirus pandemic.
Greek officials say that because of COVID-19, the lighting for the Tokyo games will go on without the thousands of spectators who usually attend.
The event could be held later in the year instead of July 24, Japan’s Olympic minister said Tuesday.
The government has urged that big gatherings be scrapped for two weeks while pledging that the 2020 Summer Olympics will go ahead in Tokyo.
The frames will be recycled into paper products after the games.
As many as 36 people are dead from the storm, which caused serious damage in central and northern Japan.
A major rescue operation is underway in parts of central and northern Japan following the typhoon's landfall near Tokyo on Saturday.