… Players wear fins, masks and snorkels (but no SCUBA tanks) and make repeated dives to the bottom of the pool where the play occurs. The intensity of the pace generally makes long dives impractical, so the most effective strategies generally involve short, explosive efforts, precision teamwork and timing, and rapid cycling of all 10 players through the 6 active positions. There are no goal-keepers or off-sides rules, and goals are often scored on exciting, break-away plays or well-timed 2-against …