“Sea lice levels of 11.53 lice per fish — almost four times the federal threshold for treatment — were also detected during a March 7 count at Cermaq’s Ross Pass farm, according to a separate email from an aquatic biologist with the federal department.

“Young salmon are streaming past these farms continuously,” said Alexandra Morton, a biologist and long-time opponent of open-net pen salmon farms, who obtained the emails through an access to information request.”