Synchronized Swimming When Upside Down Underwater

Synchronized swimming is governed internationally by FINA (Federation Internationale de Natation).
History
At the turn of the 20th century, synchronized swimming was known as water ballet. The first recorded competition was in 1891 in Berlin, Germany. Many swim clubs were formed around that time, and the sport simultaneously developed within several countries, including Australia, Canada, France, Germany, and the USA. As well as existing as a sport, it often constituted a popular addition to Music Hall evenings, in the larger variety theatres of London or Glasgow which were equipped with huge on-stage water tanks for the purpose.