There is so much to learn about food in these modern times that is should be taught in school, because what the line that separates a good habit from a toxic one is thin. Even more if you eat fish regularly!
Many people choose fish to obtain low fat proteins and the famous omega-3, that provides protection against cardiovascular diseases.
If eaten moderately (8 ounces a week), you will get the best benefits, but we also need to take into consideration that they contain substances that may are dangerous like mercury and polychlorinated biphenyls, both of them can cause heart diseases, arthritis, asthma, and other conditions.
Research made recently about fish hatchery like tilapia (the fifth most sold in the US), assure that its consumption doesn’t provide Omega-3 but Omega-6 because fish are fed with korn, this is not necessarily negative, but it blocks the Omega-3.
To make it clearer, the inflammatory power of tilapia is higher than the one in a hamburger or in bacon, so it could have a negative impact on people who have any heart disease, its inflammatory effect on the blood vessels can also affect the lungs, joints, skin and digestive system.