problem with farmed salmon
Photo: L. Renehan/Living Oceans Society. Open net-cage salmon farming is currently one of the most harmful aquaculture production systems and poses environmental threats in all regions it is practiced.The Environmental Impacts of Salmon Farming. 1  Sea Lice. 2  Chemical Treatments: SLICE. 3  Disease.pen net-cage salmon farming is currently one of the most harmful aquaculture production systems and poses environmental threats in all regions it is practiced. The Environmental Impacts of Salmon Farming.