Unfortunately, there are numerous problems with fish farming.
For one, predatory farmed fish, such as salmon, are often fed from fish meal made from wild fish, which means there's no net benefit.
Fish are farmed intensively, in much denser populations than found in the wild. In this type of environment, water pollution and animal welfare are serious concerns — disease and parasites such as lice are a big problem. It's not hard to find reports of farmed fish in horrifying condition and conditions.
As a side note, intensive farming of pigs, chickens and cattle is a major source of pollution of inland waterways. This is a direct cause of the dramatic decline of freshwater fish populations in many parts of the world.
For one, predatory farmed fish, such as salmon, are often fed from fish meal made from wild fish, which means there's no net benefit.
Fish are farmed intensively, in much denser populations than found in the wild. In this type of environment, water pollution and animal welfare are serious concerns — disease and parasites such as lice are a big problem. It's not hard to find reports of farmed fish in horrifying condition and conditions.
As a side note, intensive farming of pigs, chickens and cattle is a major source of pollution of inland waterways. This is a direct cause of the dramatic decline of freshwater fish populations in many parts of the world.
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