The backers of Norwegian offshore salmon farming projects are voicing concern about the country's new aquaculture tax rules.

The new tax, which took effect Jan. 1, remains a topic of sharp debate. During the consultation period, several companies, including Norwegian offshore groups SalMar Aker Ocean and Utror, posted their feedback to the government.

Executives at SalMar Aker Ocean, a joint operation between Gustav Witzoe's SalMar and Kjell Inge Rokke's Aker Group, are worried the new tax on aquaculture will affect the offshore sector negatively, since several conventional salmon famers, including Salmar, were poised to lead the way through massive investments.