The fight to win Cermaq shareholders’ favor has taken a new and serious turn with Marine Harvest’s open letter sent to Cermaq shareholders. Attacking a competitor the company is keen to buy is a rather "un-Norwegian" approach, Anders M. Gjendemsjo, analyst at Norne Securities told IntraFish.

“To write an open letter to the competition’s shareholders the way Marine Harvest has done, is the opposite of what is the traditional Norwegian approach to these matters," he said.

"The company challenges the exposure Cermaq has in Chile and is detrimental in its comments about the Cermaq," he said.