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Mike Park, chief executive of the Scottish White Fish Association, described the deal as an "utter betrayal".

"We've tried different types of white fish but we've not had that good feedback on them," he said.

It’s spectacular in beurre blancs atop crispy-skinned white fish or in creamy pan sauces for seared chicken.

Liberal Democrat MP for Orkney and Shetland Alistair Carmichael said the "survival of a Scottish white fish industry today" was "as a result in no small part" of Salmond's work during a time when cod stocks in the North Sea fell.

For those unfamiliar, halibut is a prized white fish beloved for its clean taste.