Shellfish (crustaceans and bivalve molluscs): HMTc Standard — page updateshttps://heavymetalcertified.com/standards/shellfishPublished revisions of this Heavy Metal Certified page.Shellfish (crustaceans and bivalve molluscs): HMTc Standardhttps://heavymetalcertified.com/standards/shellfishhttps://heavymetalcertified.com/standards/shellfish#revision-f79257cc42f74f4eSun, 20 Sep 2026 07:39:04 GMTThe Heavy Metal Tested & Certified standard for shellfish, crustaceans (shrimp, crab, lobster) and bivalve molluscs (mussels, clams, oysters, scallops), not canned, stated as consumed. Bivalves concentrate cadmium, and the cadmium ceiling reflects the strictest applicable government maximum; every limit is the strictest maximum level any credible government sets for the product.