Water Polo is a team water sport. A team consists of six field players and one goalkeeper. The winner of the game is the team that scores more goals. At the National Water Polo League level there are 4 quarters of 8 minutes duration.
The clocks are stopped each time the referee blows their whistle and restarts on the taking of the free throw. Teams have a 30 second possession clock which is reset after a shot, exclusion, corner, or change of possession.