The Institute of Marine Research says concentrations of Pseudochattonella have risen in parts of southern Norway, with signs of fish mortality already reported in some areas.
Up to 1 million salmon, including 250,000 smolts, are estimated to have been killed by the algal bloom affecting Nordland and Troms, Norwegian authorities say.
The 21st edition of the International Conference on Harmful Algae will take place in Punta Arenas, Magallanes Region, within one year, in October 2025.