0303.89.00.55 - Butterfish

This HTS classification, 0303.89.00.55, specifically designates frozen butterfish. This category falls under "Other fish," meaning it includes species not individually enumerated in preceding subheadings within 0303.89.00. The crucial defining characteristic is that the fish are presented in a frozen state, excluding any fish that have been processed into fillets or other forms of fish meat under heading 0304.

Distinguishing butterfish from its sibling categories at this level is important for accurate classification. While other subheadings within 0303.89.00 cover specific species like cusk, shad, sturgeon, or Atka mackerel, this code is for butterfish which are distinct in their species identification and characteristics. The "Other" designation at this level signifies that butterfish are not captured by the more specific preceding listings, requiring their own unique code.

As a leaf node in the HTS classification system, 0303.89.00.55 does not have further subcategories. This means that any frozen butterfish, regardless of minor variations in size or presentation (as long as they remain whole or in pieces and are not processed into fillets), will be classified under this specific code. Classification relies solely on the correct identification of the species as butterfish and its frozen condition, ensuring precise customs reporting for this particular type of fish.