Eleven salmon farms have been affected by harmful algal blooms in the Reloncaví Sound area, prompting Chilean authorities and the industry to reinforce preventative measures.
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.