Flounder — a broad commercial category spanning multiple pleuronectid and bothid species — is classified under 0302290110 when entered fresh or chilled in whole or dressed form, carved out from the broader flatfish NESOI residual. The term 'flounder' covers numerous species in US commerce, including summer flounder (*Paralichthys dentatus*), winter flounder (*Pseudopleuronectes americanus*), and various Asian species, making species-level documentation important for both FDA labeling compliance and accurate classification. Domestic US landings are significant, so imported fresh flounder competes directly with domestic supply and is most active in markets where specific species or sizes are not available locally. FDA HACCP requirements govern all imported seafood entries.

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