The Fisherman's Friends have turned down a chance to tour the US - because they would be too busy with their day jobs.
The sea-faring chart stars, whose rise to success is being turned into a film due next year, have had a number of offers to play a string of dates across the Atlantic to tie in with the release.
The sea-shanty singers from Cornish town of Port Isaac - who include four fishermen among their number - believe it would be too risky to jeopardise their jobs by attempting to emulate the success of acts such as One Direction in cracking the US.
Fisherman's Friends saw their self-titled major label debut album go to number one three years ago and a follow-up One And All is due in a fortnight.
The group's Jeremy Brown, 52, said: "We realise we are not One Direction, and breaking America takes time and commitment.
"We have a good life doing what we wanted to do in Port Isaac and the success of the singing is an amazing bonus.
"However, we know that we can't afford to be away from home for that long or we would lose our livelihood."
The singers - who also include a farmer, builder, potter and pasty-seller as well as retired Peter Rowe who is 79 - are to be immortalised in a film being directed by Nigel Cole, who was behind Calendar Girls and Made In Dagenham.
Their booking agent Neil O'Brien said: "In America everyone is fascinated by the prospect of 'the singing fishermen' and the film that is being made about them.
"Since the announcement of the movie, we have been inundated with offers for them to perform on the other side of the pond. We are disappointed that we will not be able to say yes to what would be the pinnacle of most performers careers, but we cannot argue with their reasoning."