Many must've not heard of Underwater Hockey, but it has been in existence since 1954 in the UK! Initially known as Octopush, it was founded by Alan Blake to keep members of Southsea Sub-Aqua Club Number 9 from abandoning the new club during the winter months when it was too cold to dive in the sea. The game was formerly played between two teams comprising of eight players (hence the name Octo) and needed players to push a puck across the pool's bottom (hence the term push).

As of today's rules and regulations, underwater hockey is played by two teams of six players and four substitutes per team. The players are equipped with diving mask, snorkel, swimfins, a stick and a glove. The glove is worn to protect a player's hands from abrasion caused by the pool's rough bottom surface. The stick is used to push the puck around. It's 35 cm. long and color coded as per the team. The puck is made up of lead to make it sink till the bottom and is covered with a type of plastic to facilitate friction in the right amount.

The playtime of a game is 30 minutes divided into two 15 minute halves. The rules are similar to those of normal hockey which includes the fouls, penalties, etc. The goal, or 'Gulley' is three metres wide and placed at opposite ends of the pool's bottom.

The most interesting part of the game is spectating. Either the spectators can choose to be dry and let live footage serve them as a medium, or the more adventurous kind can dive in with a snorkel and a swimfin and watch the game, underwater! The advent of technology also led to the live streaming of 2010 World Championchips. As of today, the game is widely popular in countries like UK, USA, Australia, Canada, etc. The World Championchips are held every two years and hosts under-18, Masters, and Elite level games.