Here is a new one: instead of dying of disease, lice, and so on, in-ocean fish farms in Atlantic Canada are dying because the water is too cold. This is yet another reason to get out of the ocean and farm on land where water temperature, and photo-period can easily be controlled and so more money can be made.
Here is my popular post on the 77 on-land systems I have found, comprising more than 10,000 actual on-land fish farms around the world. When will Marine Harvest, Cermaq, Grieg Seafood, Cooke Aquaculture and so on leave their polluting ways behind and come on land?
From Seafood News:
HALIFAX, An investigation has found that the deaths of salmon and trout at three Nova Scotia aquaculture sites earlier this year were caused by environmental factors, not disease.
Staff at the provincial Fisheries Department say the fish kill was caused by extremely cold temperatures experienced during a particularly harsh winter.
The sites, operated by New Brunswick's Cooke Aquaculture, are at Shelburne Harbour, Jordan Bay and Port Wade.