The 12 Most Contaminated Fish You Should Avoid at the Grocery Store

Tilefish from the Gulf of Mexico is among the most mercury-contaminated fish. It’s often recommended to avoid it completely, especially for those with health sensitivities.

7. Imported Catfish
Much of the catfish sold in grocery stores is imported from countries with lax food safety regulations. These fish are sometimes treated with antibiotics banned in the U.S., and may contain contaminants from polluted waters.

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