Finswimming is a competitive aquatic sport where participants use fins and a snorkel to swim efficiently through water. Athletes can compete in various disciplines, including surface swimming, underwater swimming, and dynamic events, which test speed and endurance. Competitions are held in pools and open water, with races typically ranging from 50 to 800 meters. Finswimming is governed by the CMAS (Confédération Mondiale des Activités Subaquatiques), which sets the rules and organizes international events. This sport combines elements of swimming and underwater diving, making it unique and exciting for both participants and spectators.