Underwater hockey is a sport played in a pool that ranges from two to three meters (six to nine feet) deep. The puck is a similar size as an ice hockey puck, but weighs about 1.3kg (~2.8lbs) so it stays at the bottom of the pool. Players wear mask, fins and a snorkel and have to dive down to the bottom to advance the puck. Their sticks are short and one-handed and are the only thing that can legally move the puck. The goal is a three meter long trough that sits on the bottom of the pool at either end of the playing area.