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About 400,000 Salmon Dead Across Three Fish Farms in Newfoundland

Mowi Canada East reports loss of about 23% of Atlantic salmon inventory at three farms due to oxygen-poor water rising to the surface, a rare natural event.

  • Mowi Canada East confirmed a mortality event that killed about 400,000 salmon at three fish farms near Harbour Breton, Newfoundland by September 5, 2025.
  • The fish deaths were caused by an oceanographic event in which colder, oxygen-depleted water from deeper layers rose to the surface, creating unfavorable conditions for the fish.
  • The affected sites held about 1.71 million salmon, making the loss represent roughly 23 percent of the Atlantic salmon inventory at those farms.
  • In a Facebook post on September 4, Mowi stated that it cannot yet confirm the precise number of fish deaths and highlighted that it has met all reporting obligations.
  • The Newfoundland and Labrador Department of Fisheries is working closely with Mowi to investigate the incident, which marks a significant biological and financial setback.
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About 400,000 salmon dead across three fish farms in Newfoundland

Mowi Canada East says about 400,000 fish have died across three of its salmon farming sites along the south coast of Newfoundland.

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SalmonBusiness broke the news in on Friday, September 5, 2025.
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