0301.91.00.00 - Trout (Salmo trutta, Oncorhynchus mykiss, Oncorhynchus clarki, Oncorhynchus aguabonita, Oncorhynchus gilae, Oncorhynchus apache and Oncorhynchus chrysogaster)

This HTS classification, 0301.91.00.00, specifically covers live trout. This includes various species of trout belonging to the genera *Salmo* and *Oncorhynchus*, such as the brown trout (*Salmo trutta*) and several species of Pacific salmonoids like rainbow trout (*Oncorhynchus mykiss*) and cutthroat trout (*Oncorhynchus clarki*). The defining characteristic for classification within this heading is that the fish are live and belong to these specified trout species, intended for aquaculture or other live fish purposes.

Distinguishing this category from its siblings at the 0301.90 level, we find classifications for other specific types of live fish. For instance, 0301.92.00.00 is designated for eels, while 0301.93.02 covers various species of carp. Furthermore, specific tunas are classified under 0301.94.01.00 and 0301.95.00.00. The residual category, 0301.99.03, is reserved for "Other" live fish not specifically enumerated elsewhere. Therefore, 0301.91.00.00 is precisely for live trout and not any of these other distinct fish types.

As this HTS code represents a leaf node, there are no further subcategories. Classification ends at the species level for live trout. When classifying live fish, it is crucial to confirm the species of the fish and verify it aligns with the scientific names listed under this HTS code to ensure accurate duty assessment and compliance.