Norwegian aquaculture consultancy agency Kontali Analyse anticipates salmon harvests to drop more than 20,000 metric tons this season because of the algal bloom, its latest report reveals.

The algal bloom has wiped out more than 11,600 metric tons of salmon in northern Norway so far.

Volumes of Norwegian salmon jumped 6 percent year-on-year to 712 million metric tons, by the end of April, according to the company's latest biomass review.