Underwater Hockey is a fast paced sport played on the bottom of a pool using a mask, snorkel and fins (not SCUBA gear). Players advance the puck, pass the puck, and curl with the puck using a stick (or "bat"), usually held with a protective glove. Each side defends a goal, located at the bottom of one end of the playing area, into which the opposing team seeks to flick the puck. Players choose when they must breathe and when they must play; since there is no air at the bottom where the game is played, teamwork and timing are critical.