Playing hockey with fins

The underwater version of the game has been called the coolest sport you never heard of, but word is getting around Hong Kong.

The hold-your-breath sport of underwater hockey has gained a worldwide following - and now a Hong Kong team is diving in as the game takes off in Asia.

Invented by British navy divers in the 1950s, the acrobatic six-a-side sport requires participants to chase a heavy plastic puck and hit it into their opponents' net with a short curved stick.