Arnold is the new chairman of the Great British Underwater Hockey Association, as it likes to be known.
He has been charged with raising the profile of the sport and taking on the Government's new Welfare for the Vulnerable Bill, which, says Arnold, could scupper future ambitions of sub-aqua puck lovers. 'The Government wants to vet those involved in the sport, but that will cost clubs like ours a fortune,' he says.
As for raising the profile, Arnold admits it's going to be a hard task.
'Part of the problem is that local authorities do not cater for our sport when building swimming pools, so venues are few and far between.'
PR-wise, it's sink or swim.