Underwater hockey follows the principle of all non-contact sports that have goals, think basketball or football (round code).
Fouls are classified into 3 types:
Stick fouls
Body fouls
Puck fouls
Fouls are penalised by awarding a free. For more serious or repeated offences, players may be sent to the sin bin for 1, 2 or 5 minutes.
Competition games consist of 2 x 15-minute halves.