Chapter 03 covers fish, crustaceans, molluscs and other aquatic invertebrates, including live, fresh or chilled, frozen, dried, salted, smoked and other processed products. This chapter is the main classification chapter for aquatic products in the HS, covering captured, farmed and primary processed products, but excludes further processed or cooked ready-to-eat aquatic food (classified under Chapter 16). Heading 0303 specifically covers frozen fish, i.e. fish that have been frozen for long-term preservation, whether or not headed, gutted or cut into pieces, but retaining the essential characteristics of fish. This heading covers marine and freshwater fish, but excludes frozen fish fillets (0304) and frozen fish livers and roes (0305). The first 2 digits 03 represent Chapter 3, "Fish, crustaceans, molluscs and other aquatic invertebrates." Digits 3-4, 03, indicate the heading "frozen fish," as distinct from 0301 live fish and 0302 fresh or chilled fish. Digits 5-6, 23, are the subheading "Danube salmon," specifically referring to the species Hucho hucho, which belongs to the Salmonidae family but is not a Pacific or Atlantic salmon. The full code 030323 is therefore frozen Danube salmon, whether whole, gutted or cut into pieces, provided its essential characteristics are unchanged. The product is frozen Danube salmon, meeting the definition of frozen fish under 0303, and the species is clearly Danube salmon (Hucho hucho), so it is classified under 030323. If fresh or chilled, it would be classified under 0302; if made into fillets, under 0304; if smoked, under 0305. Therefore, classification must be precise according to processing state and species.

Product name: The Chinese and foreign-language name of the declared product, which should accurately reflect the species and processing state, such as "frozen Danube salmon." Latin scientific name: Provide the Latin scientific name of the species. Danube salmon is Hucho hucho, used for customs species confirmation. Processing method: State the freezing method, such as "frozen," and indicate whether headed, gutted, cut into pieces, etc. State: Describe the overall state of the fish, such as whole, gutted, headed, cut into pieces, etc. Specifications: Grade by weight or size, such as "500-800 g each," to facilitate statistics and document review. Packaging method: State the inner and outer packaging, such as "inner plastic bag, outer carton, 10 kg per carton." Origin: State the country/region of capture or farming, such as "Romania." Brand: If there is a brand, declare the brand name; if no brand, write "none." Product name: Frozen Danube salmon; Latin scientific name: Hucho hucho; Processing method: Frozen, gutted, not headed; State: Whole; Specifications: 1-2 kg each; Packaging: Inner plastic bag, outer carton, 10 kg per carton; Origin: Romania; Brand: None. Misreporting Danube salmon as another salmon, leading to incorrect classification. Failing to state the processing state (such as gutted), which may result in classification under another subheading. Ignoring the Latin scientific name, affecting customs species review.

The core basis for classification is the HS Code and the Import and Export Tariff. First confirm that the product is frozen fish (0303), then determine the subheading according to species. Danube salmon (Hucho hucho) has a dedicated subheading 030323 under 0303, so the species must be accurately identified. At the same time, note the processing state: if only frozen, classify under 0303; if filleted, under 0304; if smoked, under 0305. 030214 Fresh or chilled Danube salmon: Different processing state: 030214 is fresh or chilled, 030323 is frozen. 030313 Frozen Atlantic salmon: Different species: 030313 is Salmo salar, 030323 is Hucho hucho. 030441 Fresh or chilled Danube salmon fillets: Different processing state: 030441 is fresh or chilled fillets, 030323 is frozen whole fish. 030541 Smoked Danube salmon: Different processing method: 030541 is smoked, 030323 is frozen. 030543 Smoked Atlantic salmon: Both species and processing differ: 030543 is smoked Atlantic salmon, 030323 is frozen Danube salmon. Confirm the product is frozen, not fresh or chilled. Confirm the species is Danube salmon (Hucho hucho). Confirm it is not filleted, smoked or further processed. Check that the Latin scientific name is consistent with the declaration. Check whether an endangered species certificate is required.

How can I check the tariff rate for 030323? It can be checked through the official website of the General Administration of Customs of China or the Import and Export Tariff. Rates vary due to trade agreements, origin, etc. It is recommended to use official databases or consult a customs broker for real-time information. Is Danube salmon an endangered species? Is Danube salmon (Hucho hucho) listed in a CITES appendix? In fact, it is listed as endangered by the IUCN, but it is not included in the CITES appendices. When importing, confirm whether the exporting country requires a CITES certificate. What is the difference between the codes for frozen Danube salmon and frozen Atlantic salmon? Atlantic salmon is classified under 030313, and Danube salmon under 030323. The difference lies in the species. When declaring, provide the Latin scientific name to avoid confusion. If Danube salmon is headed and gutted, is it still classified under 030323? Yes. As long as it remains whole or cut into pieces but not made into fillets, heading and gutting do not affect classification, and it remains under 030323. If cut into fillets, it is classified under 0304. What documents are required to import frozen Danube salmon? Usually a contract, invoice, packing list, bill of lading, certificate of origin, health and quarantine certificate, import animal and plant quarantine permit, etc. are required, subject to customs requirements. What is the difference between 030323 and 030321? 030321 is frozen trout (Salmo trutta, Oncorhynchus spp., etc.), while 030323 is frozen Danube salmon. The difference lies in the species. For cross-border e-commerce sales of frozen Danube salmon, is the classification different? Classification does not change based on sales channel and is still under 030323 according to the product itself. However, cross-border e-commerce must pay attention to personal item limits and quarantine requirements. What are the consequences of writing the Latin scientific name incorrectly when declaring? It may lead to incorrect classification, customs inspection, fines or return shipment, and even affect enterprise credit. Be sure to declare accurately.