A friend of mine used to play underwater rugby. Not quite submarine depths, but as far as spectator sports go, one where the vast majority of the action takes place 4 meters below the surface of a pool isn't exactly ideal.
Yeah! Even back when I was in good shape and strong and shit, I could never hold my breath for more than a minute AND I was never a very efficient swimmer, so I'd have been absolutely dreadful at underwater rugby 😂