Atlantic Sapphire's Danish subsidiary Langsand Laks was struck with "sudden and unexpected mortality" at its land-based salmon farming plant, wiping out all the fish in its grow-out system within a period of 15-20 hours on June 30. 

In a letter sent to shareholders and seen by IntraFish, Atlantic Sapphire CEO and Chairman Johan E. Andreassen said there were "no visible indications of any elevated risk factors including reduced appetite or heightened mortality" prior to the incident. 

Langsand Laks' grow out system has been running for the last two years with a low mortality of  about 10 fish per day on a standing stock of approximately 225,000 to 250,000 fish.