Iain MacSween, chief executive of the SFO, says there is also growing concern that marketing will be adversely affected this year by effort limitation.

“It is essential that every effort is made to maximize the value of Scottish landings to secure the viability of vessels,” he says in a letter to members following the European Seafood Exposition, the world’s largest seafood exhibition.

He said the range on display at Brussels is “truly staggering.” There is a “vast array” of farmed shrimp that competes with domestic shellfish production, and pangasius and cobia, a new tropical marine farmed fish being produced in Vietnam, are challenging in the whitefish sector.