Norway, the world’s biggest producer of farmed salmon, had 844,000 tonnes of biomass in the water, said statistics provider Akvafakta.
Biomass for trout was 38,000 tonnes, 15% less than at the end of December 2019.
Total salmonid biomass was 58,000 tonnes (7%) larger in December 2020 than a year earlier.
Norway exported 134,000 tonnes last month, 27% more than in December 2019, although the export value was NOK 6.8 billion (9%) lower year on year.
The December biomass figure indicates an increased supply from Norway in 2021, which could keep prices depressed. However, this is likely to be offset by a drop in production in Chile, the world’s second-largest producer of farmed salmon.