It's a sport that few understand, yet the mystery seems to have added to the spectacle as millions tuned in to watch the swimmers in the Rio pool.
Many have taken to Twitter to marvel at the stunning athletes, while admitting they have little idea what the competition actually entails.
One viewer left with more questions than answers, asked: 'What is this? What did I just watch? Are they human? Is this a sport? So many questions!'
Spectators were left scratching their heads as to how the swimmers maintained their impeccable hair and make-up, which looked pristine even as they emerged from the pool.