Closed Containment


Open net-cage salmon farming has many negative environmental implications, primarily because there is no physical separation between farms and the marine environment. Many have called for immediate precautionary farm fallows along BC’s wild salmon migration routes. Fallowing farms is the easiest way to protect wild salmon and the ecosystems they occupy. Watershed Watch is not “anti-aquaculture”, once open-net cage farms are fallowed, closed-containment technology may be suitable to supply our fish needs in a less harmful manner.

Closed containment farming separates farm fish from marine ecosystems with a physical barrier or wall and includes mechanisms to limit external impacts on the environment. Closed containment may be a long-term solution to many of the environmental impacts of today’s aquaculture industry. Numerous groups and government appointed bodies have recognized the growing wave of potential this technology holds. See below for a list of additional reports and resources regarding closed containment.

Closed containment technology has a number environmental advantages over its out-dated predecessor:

  • elimination or reduction of disease and parasite transfer to wild fish;
  • collection and treatment of solid waste and nutrient discharge;
  • reduction in the use of chemicals and other pollutants; and
  • elimination of marine bird and mammal entanglements and death.


The ‘Namgis First Nation’s KUTERRA land-based salmon farm had its first salmon enter the market place on April 22nd, 2014. These salmon grew to full size in only a year with savings of about 30% in feed without any use of chemicals (antibiotics or pesticides).

For more information on closed containment salmon farming see the resources below: