Marine predatory fish (tuna, swordfish, shark, king mackerel, marlin): HMTc Standard — page updateshttps://heavymetalcertified.com/standards/fish-marine-predatoryPublished revisions of this Heavy Metal Certified page.Marine predatory fish (tuna, swordfish, shark, king mackerel, marlin): HMTc Standardhttps://heavymetalcertified.com/standards/fish-marine-predatoryhttps://heavymetalcertified.com/standards/fish-marine-predatory#revision-670e8fbccb525fd5Sun, 20 Sep 2026 18:04:57 GMTThe Heavy Metal Tested & Certified standard for marine predatory fish, tuna, swordfish, shark, king mackerel, marlin, billfish, stated as consumed (edible portion, wet weight). Predatory species carry the higher species-specific mercury ceiling every government sets for them; every limit is the strictest maximum level any credible government sets for the product, with a disclosed read-across where none regulates the exact analyte.