The Norwegian seafood giant said its Scottish business achieved earnings before interest and tax of 16.47 Norwegian Krone (£1.72) per kilo of salmon in the three months to September, compared with 2.21 NOK per kilo in the same period last year.
The return achieved in Scotland was at least five Krone per kilo higher than that published for any other country by Marine Harvest in yesterday's quarterly results announcement.
One of the biggest salmon farming businesses in Scotland, the company also has operations in Norway, Canada and Chile.
"I would like to highlight the results of Scotland," said chief executive Alf-Helge Aarskog. "Scotland delivers a record high result, and we congratulate the team with the achievement."
The company said the improvement in the results in Scotland had been driven by factors including the good biological performance on its sea farms, effective cost control and high prices for salmon. The company harvested higher volumes of fish in the quarter.
It has 25 sea farms off western Scotland and on the mainland, a processing plant in Fort William and a head office in Edinburgh.
Marine Harvest employs 502 people in Scotland.
The Marine Harvest Group achieved earnings before interest and tax of NOK 793m in the third quarter, compared to NOK 73m in the same period in 2012.
"The strong market enabled good results in the quarter," said Mr Aarskog.