Octopush: hockey in deep end at National Aquatic Centre
Ireland will tog out today against some of the best players in Europe in one of the world's most obscure sports.
Originally known as Octopush, underwater hockey is played by two groups of six, with four subs who operate on a tag-team basis. In addition to fins, hat, goggles and snorkel, each player has a stick the length of a spatula.
The idea is to carry or pass the puck with the stick and score against your opponent. The defining element, of course, is that all manoeuvres must be performed while holding your breath.
The Dublin Invitational Underwater Hockey tournament will take place at the National Aquatic Centre.
It will see the Great Britain Masters team, and Sussex Underwater Hockey club, competing against Dublin and Cork-based teams, along with a selection of players from around the country.
The event gets under way at 10.30am today, finishing at 3.30pm.