Mowi denies harm from 75,000-fish escape — despite admitting escapes damage wild salmon

Green Britain Foundation (GBF) has condemned both Mowi and the Scottish Government after the world’s largest salmon producer lost 75,000 farmed salmon from its Gorsten site on Loch Linnhe, with no penalty, no accountability, and no change to the law.

The mass escape marks one of the largest in recent Scottish history, yet no fine has been issued. Escapes remain non-statutory offences in Scotland, meaning even industrial-scale releases carry zero legal consequence.

Mowi denies risk, but its own documents say otherwise

Responding to coverage of the escape, Mowi told The National:

“It is inaccurate to suggest escaped fish might be diseased, cause environmental damage, or pose any significant risk to wild breeding populations.”

Yet in its own corporate publications, Mowi has repeatedly admitted that escapes harm the environment.

From Mowi’s 2025 Industry Handbook:

“Escaped farm-raised salmon may have a negative impact on the environment due to interactions and interbreeding with wild populations, and fish farmers have a target of zero escapes.”

The Global Salmon Initiative, of which Mowi is a founding member, echoes this warning, committing to “targeting zero escapes across all member farms to avoid any risk of ecological interactions or interbreeding with wild populations.”

Despite these admissions, neither Mowi nor the Scottish Government has acknowledged the environmental implications of the Loch Linnhe escape or taken enforcement action.

No fine. No accountability.

Unlike Norway, where salmon escapes are treated as serious environmental offences carrying six-figure fines, Scotland imposes no penalties even for mass events.

GBF argues that this regulatory vacuum leaves Scottish waters unprotected and creates a culture of impunity among salmon producers.

GBF statement

Dale Vince, founder of the Green Britain Foundation, said:

“This is pollution, the dumping of tens of thousands of farmed salmon that are toxic to the wild salmon population of Scotland.

It’s incredibly harmful but simply allowed without penalty - how does that encourage the farmed fish industry to clean its act up?

Mowi would be, and have been, fined for this in their home country of Norway; in Scotland they’re waved through. Why is Scotland a place for foreign companies to come and behave badly with impunity?

Storms didn’t do this, weak rules did. Open-net pens fail again and again, and every time the public pays.

Make escapes a crime. Fine automatically. Publish every incident within 24 hours. Suspend serial offenders. Until then, Scotland isn’t protecting nature — it’s protecting corporate failure.”

The real danger: ecological contamination

Escaped farmed salmon can:

• Interbreed with wild salmon, weakening genetic resilience.

• Transmit parasites and disease, such as sea lice or viral pathogens.

• Disrupt ecosystems through competition for food and habitat.

Even Mowi acknowledges these impacts in its own sustainability commitments. Yet the company and the regulatory bodies overseeing it, continue to downplay the risks to Scotland’s fragile wild salmon populations.

GBF’s calls for urgent reform

The Green Britain Foundation is demanding decisive action:

1. Make escapes a statutory offence with automatic fines (per fish and/or per day) and mandatory restoration measures.

2. Publish every escape and near-miss within 24 hours on a live public dashboard.

3. Commission an independent investigation into the Gorsten failure — including moorings, net integrity, maintenance and contingency plans.

4. Align penalties with Norway, Iceland, and Chile, allowing for production curbs or suspensions for repeat offenders.

A test of Scotland’s environmental credibility

GBF warns that Scotland’s failure to act is enabling repeat offenders to damage ecosystems with impunity: If the Government thinks it’s acceptable to fine the public £80 for littering but nothing for 75,000 escaped salmon, then the sickness runs deep - it lies in the cosy relationship between ministers and the industry they are meant to regulate.

Until escapes are treated as serious environmental crimes, the Foundation says, Scotland will remain a sanctuary for corporate pollution, not for nature.