NZ King Salmon is closing down 3 of its 4 fish farms in Marlborough Sounds.
Warming sea temperatures is the reason behind this, which have become a growing issue for the company for the past 4-5 years.
Over the last few summers, sea temperatures off the New Zealand coast have been around 5 to 6 degrees warmer than normal.
BusinessDesk managing editor Pattrick Smellie joined Heather du Plessis-Allan.
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