It is played on the bottom of a swimming pool by two teams of six.
Players wear fins, mask, snorkel, and a protective glove and headgear.
Individual strength is less of an advantage than it is in many other sports. The water nullifies pure mass advantage and emphasizes clever use of torque. In competition, games are two 15 minute halves, and teams can have up to 4 substitutes on the deck who can enter play on the fly. The rules of the game inhibit the use of brute force and allow small people to compete effectively and equally with larger people. In the game, exertion usually shortens bottom time to less than 30 seconds.