Finswimming...
Is an underwater sport consisting of four techniques involving
swimming with the use of fins either on the water's surface using a snorkel
with either monofins or bifins (i.e. one fin for each foot) or underwater with
monofin either by holding one's breath or using open circuit scuba diving
equipment. Events exist over distances similar to swimming competitions
for both swimming pool and open water venues. Competition at world and
continental level is organised by the Confédération Mondiale des Activités
Subaquatiques (CMAS). The sport's first world championship was held in
1976. It also has been featured at the World Games as a trend sport since
1981 and was demonstrated at the 2015