I learned something new today. I always thought that farm raised fish were the “healthy fish.” People eat them because they were fed KNOWN substances, typically grains. To me, that makes sense. By eating the farm raised fish, I am not concerned about the possibility of the fish eating contaminants. This article on health.com, however, states that farm raised fish may actually be less healthy than the wild fish. The diets of farm raised fish does not include algae, which is a staple in the diet of fish in the wild. It is this algae which builds the levels of eicosapentaenoic and docosahexaenoic acids in their system - omega-3 fatty acids.
Farm raised fish have less of these healthy fats, but have been shown to have higher concentrations of saturated and monounsaturated fats. Farm raised fish have also been shown to in some cases have twice the amount of omega-6 fatty acids in their bodies. In moderation and with the right combination of omega-3s, omega-6 fatty acids can lead to lowered blood pressure. The typical American diet has 11 - 30 times more than required, likely due to the presence of omega-6 in meats. Too much of this fatty acid in the diet can lead to heart disease, arthritis and cancer. From now on, I will be less leery of wild fish.