In this 2017 photo provided by Simon Pierce, Jonathan Green checks on a fin-mounted satellite tag on a whale shark in the Galapagos Islands area of Ecuador. Despite typically being bigger than a double-decker bus, the elusive whale shark has only tiny, almost useless teeth. It's also one of the least understood animals in the ocean. (Photo by Simonjpierce.com via AP Photo)

Russian cadets march during the annual cadet schools get-together in Moscow, Russia on March 30, 2018. (Photo by Mladen Antonov/AFP Photo)

A mother reacts as she pleads with police to allow her daughter to pass a checkpoint for cancer treatment after she arrived from Hubei province at the Jiujiang Yangtze River Bridge in Jiujiang, China, February 1, 2020. (Photo by Thomas Peter/Reuters)

Mortuary Chamber of the Ponte San Pietro Hospital in the Province of Bergamo on March 18, 2020 – the area in Italy where the highest number of infections was recorded by COVID19 Coronavirus. (Photo by Carlo Cozzoli/IPA/SIPA Press/Rex Features/Shutterstock)

A Cambodian man sells shoes on a motorized cart travelling along a street in Phnom Penh, Cambodia, 30 April 2020. Cambodian authorities are enforcing strict traffic rules in an effort to cut down traffic accidents on the road as a new land traffic law will go into effect in the beggining of of May 2020. (Photo by Mak Remissa/EPA/EFE)

A man throws water on a girl playing in a pool, during a hot weather, amid concerns over the spread of coronavirus disease (COVID-19), in Sidon, southern Lebanon on May 21, 2020. (Photo by Ali Hashisho/Reuters)

Two Brits enjoy Saturday night in Leeds, United Kingdom in bank holiday on May 1, 2021, as number of coronavirus cases and deaths keep decreasing in the UK. The government today reported seven new coronavirus deaths and a further 1,907 infections. (Photo by Nb press ltd)

A spot-billed pelican sits on a street light in Colombo on March 16, 2021. (Photo by Ishara S. Kodikara/AFP Photo)