A performer practices her mermaid swim next to a shark in an aquarium after graduating from a mermaid workshop in Guangzhou, Guangdong Province, China December 16, 2016. (Photo by Tyrone Siu/Reuters)

A swimmer swims by a swan in The Serpentine in Hyde Park, following the outbreak of the coronavirus disease (COVID-19), London, Britain, May 26, 2020. (Photo by John Sibley/Reuters)

A winter swimming enthusiast dives into a partly frozen lake in a partly frozen lake in Shenyang, in northeastern China's Liaoning province on January 25, 2022. (Photo by AFP Photo/China Stringer Network)

Brazil's team performs in the artistic swimming acrobatic routine final at the Pan American Games in Santiago, Chile, Friday, November 3, 2023. (Photo by Matias Delacroix/AP Photo)

A girl watches as a man jumps to cool off at a swimming pool in the village of Zllakuqan near the town of Klina on July 9, 2024. (Photo by Armend Nimani/AFP Photo)

Maya Jama reaches for the skies in a rainbow swimming costume. Presenter Maya posed in the sun during a getaway trip to Ibiza on August 19, 2025. (Photo by Instagram)

A swimmer disguised as Superman dives into the lake during the 78th “Coupe de Noel” (Christmas cup) swimming race in the Lake Geneva, on December 18, 2016 in Geneva. More than 1800 participants took part in the event, a 12-meter-long swimming off the Geneva's bank in the 7 degrees Celsius cold water. (Photo by Fabrice Coffrini/AFP Photo)

A swimmer stops short of a red algae bloom at Sydney's Clovelly Beach on November 27, 2012, which closed some beaches for swimming including Bondi Beach for a period of time. While the red algae, known as Noctiluca scintillans or sea sparkle, has no toxic effects, people are still advised to avoid swimming in areas with discoloured water because the algae, which can be high in ammonia, can cause skin irritation. (Photo by William West/AFP Photo)