Deadly algal bloom killed 7 million fish—now we know why. Researchers from the Veterinary Institute of Norway, along with international collaborators, have identified the toxin responsible for the 2019 mass mortality event, where over seven million farmed salmon died during a severe algal bloom in northern Norway. The algae Chrysochromulina leadbeateri was found to have … Continue reading Secret killer behind 2019 mortality event in which 7 million fish died is finally unveiled