How Much Fish Is Contaminated By Mercury in the USA

Most-contaminated fish species hideMercury levels in commercial fish and shellfish species Mean (ppm) Comment Tilefish (Gulf of Mexico) 1.123 Mid-Atlantic tilefish has lower mercury levels and is considered safe to eat in moderation. Swordfish 0.995 Shark 0.979. Are all fish contaminated with mercury? Nearly all fish and shellfish contain traces of methylmercury. However, larger fish…