According to information I got from Ocean Wise, Sockeye Salmon is mostly wild, and we should avoid catching Gillnet, Purse Seine and Troll varieties in the US, Washington, Oregon and California regions. In these areas, hatchery fish are mixed with wild salmon populations and are likely to capture natural salmon that are classified as endangered species. Therefore, in order to prevent the extinction of endangered species in the area, these fish should be resisted.
When fish are farmed, the fish is very dense, so the growth environment is not good and the fish is prone to illness. And because of the limited space available, excreta does not disperse in time, so nearly a quarter of fish can quickly spread fish disease. These fish are cultured in the process of interacting with wild fish, spreading the disease to wild species, infecting most of the wild fish and killing them. If this continues, it may kill all our fish: farmed and wild, so I think farmed fish are not sustainable.
The advantage of farmed fish is that it provides a guaranteed “harvest” for fish farmers and they can control the variety and yield obtained, thus reducing the price of fish. I think that the way to make the aquaculture sustainable is to raise the fish to the young age and then stock it in nature so that the fish can be more dispersed, the likelihood of disease is greatly reduced, and it will be more natural. When the fish is back, the fishermen can catch them with the big net, so that we can put more fish back into the ecosystem, which can effectively avoid the occurrence and spread of fish diseases.