Chapter 03 covers fish, crustaceans, molluscs and other aquatic invertebrates, including live, fresh or chilled, frozen, dried, salted, in brine, smoked, etc. This chapter does not include prepared foods (such as canned goods, fish balls, etc., which fall under Chapter 16), nor does it include live fish other than ornamental fish (e.g., live tuna falls under 0302). The core is that the goods remain in the basic form of aquatic animals, without deep processing that changes their essential characteristics. Heading 0303 specifically refers to frozen fish, i.e., fish that have been frozen for long-term preservation, whether or not headed, gutted, sliced, etc., but must remain in the basic form of fish. This heading covers various fish species, including tuna, salmon, cod, etc. Note: Frozen means the temperature is lowered below freezing point to freeze the fish body, which is different from fresh or chilled (0302) and dried, salted or smoked (0305). Code 030349 has 6 digits: the first 2 digits '03' represent Chapter 03 (fish and aquatic invertebrates); the 3rd-4th digits '03' represent heading 0303 (frozen fish); the 5th-6th digits '49' represent subheading 030349, specifically 'other frozen tuna'. Among them, the genus Thunnus under 0303 is subdivided into multiple subheadings: 030341 (frozen longfin tunas), 030342 (frozen yellowfin tunas), 030343 (frozen skipjack or stripe-bellied bonito), 030344 (frozen bigeye tunas), 030345 (frozen bluefin tunas), 030346 (frozen southern bluefin tunas), 030349 (other frozen tunas). Therefore, 030349 covers other tuna species not specifically listed. The product is frozen tuna, but it is not a specifically listed species such as longfin, yellowfin, skipjack, bigeye, bluefin, or southern bluefin, so it is classified under 030349 'other'. If it were fresh or chilled tuna, it would be classified under 0302; if smoked, dried or salted, under 0305; if made into canned goods or surimi products, under Chapter 16. Correct classification requires confirmation of species, preservation method, and degree of processing.

Product name: Fill in the Chinese and Latin scientific name of the specific tuna species, such as 'Frozen other tuna (Latin name: Thunnus spp.)', avoiding a generic 'frozen fish'. Preservation method: Clearly state 'frozen', and indicate the freezing temperature and condition, such as 'frozen storage below -18°C'. Processing state: Indicate whether headed, gutted, deboned, sliced, etc., such as 'headed and gutted, whole frozen'. Latin scientific name: Provide the Latin scientific name of the tuna, such as Thunnus albacares (yellowfin tuna), to accurately distinguish species. Specifications: Fill in the weight or size range per fish, such as '5-10 kg each', to assist customs inspection. Packaging method: Indicate inner and outer packaging, such as 'inner plastic bag, outer carton, 20 kg per carton'. Place of origin: Fill in the country/region of capture or farming, such as 'origin: Spain'. Brand: If there is a brand, fill in the brand name; if no brand, fill in 'none'. Product name: Frozen other tuna (Latin name: Thunnus thynnus) Preservation method: Frozen, below -18°C Processing state: Headed and gutted, whole frozen Specifications: 8-12 kg each Packaging method: Inner plastic bag, outer carton, 20 kg per carton Place of origin: Spain Brand: None Remarks: Not longfin, yellowfin, skipjack, bigeye, bluefin, or southern bluefin tuna Mistakenly classifying frozen tuna under 0302 (fresh or chilled) because the preservation method is not specified as frozen. Confusing tuna with skipjack; skipjack falls under 030343 and must be distinguished by Latin scientific name. If tuna has been smoked, it should be classified under 0305, not 0303.

The core basis for classification is: 1) the product is of the genus Thunnus; 2) the preservation method is frozen (temperature below freezing point); 3) it has not been smoked, dried, salted, or otherwise processed; 4) it does not belong to the specifically listed subheadings for longfin, yellowfin, skipjack, bigeye, bluefin, or southern bluefin tuna. Reference should also be made to the Import and Export Tariff and customs classification decisions to ensure the species and processing state conform to the description of 030349. 030341 Frozen longfin tunas: 030341 specifically refers to longfin tuna (Thunnus alalunga), while 030349 is for other species. If the species cannot be determined, it must be distinguished by Latin scientific name. 030342 Frozen yellowfin tunas: 030342 specifically refers to yellowfin tuna (Thunnus albacares), which is not covered by 030349. Accurate scientific name must be provided at declaration. 030343 Frozen skipjack or stripe-bellied bonito: Skipjack (Katsuwonus pelamis), although often confused with tuna, is classified under 030343, different from 030349. Taxonomic differences must be noted. 030344 Frozen bigeye tunas: Bigeye tuna (Thunnus obesus) is classified under 030344, while 030349 only covers unlisted tunas. Misdeclaration may lead to incorrect classification. 030345 Frozen bluefin tunas: Bluefin tuna (Thunnus thynnus) is classified under 030345, clearly different from 030349. Latin scientific name must be checked to avoid confusion. Confirm the product is of the genus Thunnus and is not longfin, yellowfin, skipjack, bigeye, bluefin, or southern bluefin. Confirm the preservation method is frozen, not fresh or chilled, dried, smoked, or salted. Confirm it has not been deep-processed, such as made into canned goods or fish balls. Check the Latin scientific name to ensure consistency with the declared product name. Check whether packaging and labels meet the requirements for frozen aquatic products.

How to determine whether frozen tuna is classified under 030349? First confirm it is of the genus Thunnus and the preservation method is frozen. Then exclude the specifically listed species such as longfin, yellowfin, skipjack, bigeye, bluefin, and southern bluefin; the remaining other tunas are classified under 030349. It is recommended to provide the Latin scientific name and processing state for accurate classification. What is the main difference between 030349 and 0302 (fresh or chilled tuna)? The core difference is the preservation method: 0302 is fresh or chilled, with temperature near 0°C; 030349 is frozen, with temperature usually below -18°C. If the tuna is only chilled and not frozen, it should be classified under 0302. The preservation temperature must be indicated at declaration. If frozen tuna has been smoked, which code should it be classified under? Smoked tuna, even if frozen, is classified under 0305 (dried, salted or smoked fish) due to the smoking process. 030349 only covers unsmoked frozen tuna. Note: If smoked and then made into canned goods, it is classified under Chapter 16. Is it mandatory to provide the Latin scientific name when declaring 030349? Yes, the Latin scientific name is key to distinguishing tuna species. Customs may require the scientific name to confirm whether it belongs to 030349. If unable to provide, it may lead to classification disputes or delays. It is recommended to fill in the complete scientific name in the remarks column of the customs declaration. Does heading and gutting frozen tuna affect classification? Heading and gutting are primary processing and do not change the essential nature of the goods; they remain classified under 0303. However, if further sliced into fillets, etc., if the basic characteristics are not changed, they may still be classified under 0303; if made into fish balls, surimi, etc., they are classified under Chapter 16. How to check the import tariff rate for 030349? Tariff rates may change. It is recommended to check the latest rates through the General Administration of Customs website, China International Trade 'Single Window', or the Import and Export Tariff. You may also consult a professional customs broker. Note: Different places of origin may apply agreement rates, and a certificate of origin may be required. What inspection and quarantine documents are required for importing tuna under 030349? Usually, an official health certificate from the exporting country, certificate of origin, import animal and plant quarantine permit (if applicable), fishing certificate, etc. are required. Specific requirements are subject to the latest customs regulations. It is recommended to confirm with the customs broker in advance to avoid omissions. What are the consequences of mistakenly declaring 030349 as 030342? It may lead to incorrect classification, affecting tax collection and statistics. If discovered by customs, it may require amendment of the declaration, payment of additional taxes, or even penalties. It is recommended to declare truthfully and apply for pre-classification if necessary.