Norway's Marine Research Institute (HI) unsure of the depth and concentration of algal bloom after taking samples at 1 meter and 25 meters deep.
Algae was found in both levels, however, the concentration seemed to decrease with depth, HI Marine Biologist Eli Gustad told IntraFish.
Losses in Nordland county ran to 3.7 million fish (6,400 metric tons), while in Troms losses were reported to be around 4 million fish (6,800 metric tons) as of last week.
Algae cannot survive without sufficient light, which is why concentrations are highest on the surface, Gustad said.
