A water polo team is typically composed of SEVEN players. Water polo is a sport that is played in a swimming pool and involves two teams of SEVEN players each, who attempt to score goals by throwing a ball into the opposing team's goal. The game is played with a ball that is slightly larger than a volleyball and is usually made of leather or a synthetic material. Players use a variety of techniques to move the ball around the pool, including swimming, treading water, and passing the ball to teammates.