Two appeals have been launched against the government consent for New Zealand King Salmon's offshore venture Blue Endeavour.

New Zealand King Salmon was given the green light to begin farming the first open-ocean finfish site in New Zealand last month after a six-year process for approval.

Farming close to shore has been made increasingly difficult for the producer as New Zealand bears the brunt of warming water temperatures, while offshore sites offer cooler temperatures and better water flow.

The appeals came from the New Zealand Department of Conservation (DoC), which is seeking changes to the conditions imposed by the consent, and environmental think tank McGuinness Institute.