The Joy of the Olympics: Artistic Swimming
This is the sport previously known as “synchronized swimming.” The organization in charge changed the name in 2017, apparently to bring it in line with artistic gymnastics, though not everyone was on board with the change (the Russians were especially vocal). Like that wing of gymnastics, it’s for women only at the Olympics. There is a men’s event at the world championships, but that hasn’t made its way to the Games as yet. Ironically, the sport was originally male only when it began in the late 19th century.