People will play croquet underwater

Jean-Marc Côté : Artist
In 1899, French commercial artist Jean-Marc Côté and other unknown French artists produced a series of postcards (En l'an 2000) showcasing a vision of life in the year 2000. Science fiction writer Asimov stated that the pictures had been commissioned by a toy or cigarette manufacturer that then suddenly went out of business, leaving a unique set of images. Others believe the postcards were issued for the Paris World Exhibition in 1900 or created by another French artist Villemard in 1910. Either way, this illustration envisions an underwater version of croquet. While underwater hockey has been established as an independent sport, croquet remains to be played on green fields.

Isaac Asimov. Futuredays: A Nineteenth Century Vision of the Year 2000 [book] 1985