The fish is caught in the north Atlantic Ocean, deep-frozen and shipped to China for processing by workers earning less than £1 (€1.10/$1.60) a day before being refrozen and returned to Scotland.
The globe-trotting trek has been condemned as "madness" and "ridiculous" by Scottish fish producers, fishermen and environmentalists, who say it happens despite pledges by supermarkets and food producers to reduce their pollution and food miles, Sunday Herald reported.
The revelation raises questions about the environmental and social impact of the globalization of the Scottish food industry.
"Surely
