Mussel Byssus Threads
Dried mussel byssus threads, also known as beard threads, are removed from mussels and dried, making them unfit for consumption. They are used in biotechnological research or as a source of collagen. This product falls under tariff item 0511.91.00 as a product of molluscs not elsewhere specified.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the byssus threads are spun or woven into a textile
Silk yarn and other animal textile materials may fall under Section XI.
If the threads are mixed with other animal products
Other animal products not elsewhere specified may apply.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Confirm the byssus threads are not edible and are solely for industrial or research use
• If the threads are processed into a textile material, they may be classified elsewhere
• Keep records of the drying process and intended use for CBSA
Related Products under Tariff item 0511.91.00
Abalone Shell Waste
Abalone shell waste consists of irregular shell pieces from abalone molluscs, unfit for food, used in inlays, crafts or decorative applications. As products of aquatic invertebrates of Chapter 3, they are classified under tariff item 0511.91.00 as animal products not elsewhere specified.
Clam Processing Waste
Clam processing waste consisting of guts, shells, and siphons from clam harvesting, contaminated and unfit for human consumption. These are mollusc products of Chapter 3, classifiable under tariff item 0511.91.00 as dead aquatic animal products. Used in fishmeal production or composting.
Crab Carapace Fragments
Crab carapace fragments are broken shells from crabs, dried and unfit for food, used for chitin extraction or fertilizer production. As products of crustaceans of Chapter 3, they are classified under tariff item 0511.91.00 as animal products not elsewhere specified.
Crab Shell Chitin Waste
Crab shell chitin waste, consisting of pre-extraction shells with residual protein, unfit for human consumption. These crustacean waste products from Chapter 3 are classifiable under 0511.91.00 as dead aquatic animal products. Raw material intended for chitin processing before chemical conversion.
Dead Frozen Tuna
Dead frozen tuna, whole fish rejected as unfit for human consumption due to quality issues, intended for rendering. These dead fish products from Chapter 3 are classifiable under 0511.91.00 as dead animals of Chapter 3. Distinct from prime frozen tuna classified under heading 0303.
Dead Jellyfish Carcasses
Dead jellyfish carcasses are whole or partial dead jellyfish unfit for human consumption, sourced from Chapter 3 animals, used in research or extraction of compounds. They are classified under tariff item 0511.91.00 as products of aquatic invertebrates not elsewhere specified.