Yes. FDA monitors imported swordfish for methylmercury under its seafood safety program and has issued consumption advisories for certain populations. Shipments may be subject to automatic detention if a foreign processor has a history of violations. Importers should ensure their suppliers maintain current HACCP plans and have a clean FDA compliance record to avoid port-of-entry holds.

Fresh or chilled swordfish fillets (0304450000) and frozen swordfish fillets (classified in a separate subheading) may carry different duty rates under the HTS schedule. Importers should verify the applicable rate with a licensed customs broker, as the distinction between fresh/chilled and frozen is a hard classification boundary that affects both duty and admissibility procedures.