Ukip leader Nigel Farage says politicians “should be on their knees apologising” to fishermen for their treatment of a vital economic resource.
He said they had surrendered control of a “very, very important” industry as part of a deal to be a member of the European Union.
And his party would campaign for a referendum on EU membership if it won a European Parliament seat for Scotland on May 22.
Mr Farage claimed that the gap between euro- sceptism in Scotland and England was not that wide and returning a Ukip MEP would illustrate that point.
“Your politicians should be on their knees apologising to fishermen over what they have done,” he said.
“They have surrendered a 200-mile exclusive economic zone – a fantastic, massive asset has been given away.
“You only have to look at how Norway has managed its waters and policed its resource to realise just how powerful that could be for Scotland, but it will never happen while we remain part of the EU.”
Mr Farage has predicted that Ukip could win two seats in the European election.
He added that he admired First Minister Alex Salmond for his political achievements but would “respect” him more if he called for an EU referendum after a Yes vote in the independence referendum September 18.
“People are being offered a choice to vote for a proposition that involves EU membership.
“You cannot be independent if you join a super- national organisation whose laws are supreme over yours and whose areas of competence over your lives means that three-quarters of your laws are made somewhere else.”
Moray SNP MP Angus Robertson said opinion polls showed no sign of a breakthrough for Ukip in Scotland.
“Nigel Farage and his party will continued to be defeated at the ballot box.
“The referendum in September is a choice of two very different futures – a fact highlighted by the contrasting Ukip polling figures south of the border.”