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Escaped Salmon from Icelandic Fish Farm Threaten Wild Fish

salmon farm in Norway. Escaped salmon. farmed salmon threaten wild salmon.

In August of 2023, roughly 3,500 farmed salmon escaped an Icelandic fish farm operated by Arctic Fish. Arctic Fish is owned by the Norwegian seafood company Mowi. The escaped salmon were being farmed in open pens, which have already drawn criticism from environmentalists. The open pens allow the farmed salmon to live in conditions that mimic those of wild salmon but have several negative effects. Environmental threats from open-pen fish farms include increased Pollution and the spread of communicable diseases from farmed to wild salmon. The recent escape has led to renewed criticism of open-pen fish farms and requests for them to be shut down. It has also been singled out by experts as jeopardizing the future of wild Atlantic salmon in Iceland.

The escape is of particular concern because many of the escaped salmon have reached sexual maturity. The farmed fish can breed with wild salmon, which will have devastating impacts on the wild fish population. Indeed, this event is being referred to as an “environmental catastrophe” by Guðmundur Hauker Jakobsson in a statement given to news publication The Guardian.

The escaped salmon can be distinguished from wild salmon by a few key features. These include torn fins and rounded tails. Additionally, farmed salmon reach reproducing age much more quickly than their wild counterparts. If the farmed fish interbreed with wild populations, the risk that the juvenile offspring will die increases drastically. This will have devastating effects on the population of wild Atlantic salmon in Iceland.

The escaped salmon also pose a threat to wild fish due to pests and diseases. Farmed salmon may carry many diseases that are deadly to wild fish. These include sea lice, which are small parasites. Sadly, there have been unconfirmed reports that some of the escaped farmed salmon may be carrying sea lice.

The escaped salmon have already been spotted in up to 32 rivers. Efforts to mitigate the threat the farmed fish pose are underway. These efforts include using divers to locate and recapture the farmed fish. The divers are employed by Arctic Fish. However, the success of these efforts in preserving the wild salmon population remains to be seen.

This is not the first time that farmed fish have escaped. In 2021, over 80,000 farmed salmon escaped from another Icelandic fish farm. The company, named Arnalax, faced heavy fines for failing to report the incident. There have also been reported escapes of farmed fish in Norway and Scotland. These two countries produce large amounts of farmed salmon. Both have also seen significant reductions in the amount of wild salmon present. Alarmingly, over the past 40 years Scotland has seen a 40 percent decrease in the number of wild salmon that return to its rivers. Although other factors, including climate change and habitat loss, are partially responsible, officials warn that both escaped fish and the spread of sea lice have played a role in the loss of Scottish wild salmon.

Many Icelandic officials have called for an end to open pen fish farming in the country. The majority of Iceland’s population agrees with this stance. However, in the remote regions where many of these farms are based, the fish farms are welcomed due to the jobs and economic opportunities that they create. However, conservationists warn that open pen farms will continue to put wild salmon at risk.

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