The Section 301 Seafood Tariff Threat: What Importers Need to Know Now

A coalition of 20 House lawmakers just asked USTR to launch the broadest seafood trade investigation in U.S. history. If you import shrimp, catfish, tilapia, or any processed seafood, the tariff landscape beneath your supply chain is shifting — and you have weeks, not months, to prepare.

On May 11, 2026, twenty members of Congress sent a letter to Ambassador Jamieson Greer at the Office of the United States Trade Representative requesting a "broad Section 301 investigation into unfair acts, policies, and practices affecting trade in seafood and seafood products." This isn't a press release or a vague threat. It's a formal request, backed by an April 2025 Executive Order, referencing ongoing USTR investigations, and citing a GAO report that found the FDA inspects less than 2% of imported seafood.

The U.S. imported over $26 billion in seafood products in 2025. China's share has collapsed from 12.77% ($2.96 billion) in 2018 to just 4.80% ($1.278 billion) in 2025 — but the imports didn't disappear. They shifted to Vietnam, Ecuador, India, and Indonesia. And that's exactly what this investigation is designed to unravel.

If USTR initiates this investigation, it would join two massive Section 301 actions already underway: one covering forced labor enforcement across 60 economies (initiated March 12, 2026) and another targeting excess manufacturing capacity in 16 economies (initiated March 11, 2026). Together, these represent the administration's post-IEEPA tariff strategy — and seafood is next in line.

The Legal Foundation: Executive Order 14276

On April 17, 2025, President Trump signed Executive Order 14276, "Restoring American Seafood Competitiveness." The order specifically directs USTR to:

• Examine trade practices of major seafood-producing nations
• Consider enforcement responses under Section 301
• Address forced labor, illegal subsidies, and regulatory circumvention in global seafood supply chains

This wasn't a standalone gesture. Ambassador Greer has publicly stated that USTR expects to initiate "several investigations under Section 301," explicitly including seafood. The congressional letter is designed to turn that stated intent into formal action.

The 20 lawmakers — led by Representative Clay Higgins — cited the executive order, the USTR's own statements, and the GAO's January 2025 report (GAO-25-107571) documenting systemic failures in imported seafood inspection.

Why Seafood, Why Now: The Post-IEEPA Landscape

Here's the context that makes this urgent. In February 2026, the Supreme Court struck down all tariffs imposed under IEEPA (International Emergency Economic Powers Act), ruling the President lacked authority to use emergency powers for trade policy. That wiped out tariffs covering hundreds of billions in imports.

The administration's response has been aggressive: pivot to Section 301 of the Trade Act of 1974, which provides explicit statutory authority for tariff actions tied to unfair trade practices. Two investigations launched in March 2026 already cover:

According to the Congressional Research Service (IN12672), if foreign practices are found actionable under these investigations, "USTR could potentially impose a regime of economy-specific tariffs similar in scope to tariffs imposed under IEEPA."

That's the replacement framework. Section 301 is how the administration rebuilds its tariff wall — and seafood is a politically compelling target.

The Existing Tariff Landscape: AD/CVD Orders on Shrimp

This wouldn't be starting from zero. Seafood — particularly frozen warmwater shrimp — already faces significant antidumping and countervailing duty orders:

Existing antidumping duty orders on frozen warmwater shrimp:

• China — AD order in place (maintained in sunset review)
• India — AD order in place + CVD investigation
• Vietnam — AD order in place (20th administrative review preliminary results issued 2026)
• Thailand — AD order in place (maintained in sunset review)
• Ecuador — CVD investigation (found to be subsidizing exports)
• Indonesia — AD investigation final determination issued

In November 2025, the ITC ruled that frozen shrimp imports from Ecuador, India, and Vietnam were subsidized, injuring the domestic industry. Vietnam's shrimp exports to the U.S. hit $800 million in 2025 but dropped nearly 30% in Q1 2026 — to roughly $95 million — as duties began biting.

A new Section 301 investigation could stack additional tariffs on top of existing AD/CVD duties, compounding costs dramatically.

Which HTS Codes Are at Risk

If you import seafood, here are the primary tariff headings in the crosshairs:

Many of these currently carry zero or minimal general duty rates. A Section 301 action could add 25%, 50%, or even higher tariffs — as we've seen with Section 301 tariffs on Chinese semiconductors (now at 50%) and solar cells (50%).

The key risk zone is Chapter 3 (Fish and crustaceans) and Chapter 16 (Preparations of fish) of the HTSUS. If you're importing under any subheading in 0304, 0306, or 1604–1605, you need to be paying attention.

The Forced Labor Connection

The congressional letter doesn't just cite economic competitiveness. It references forced labor — the same practice driving the 60-economy Section 301 investigation already underway.

The Uyghur Forced Labor Prevention Act (UFLPA) has already resulted in dozens of seafood shipments being detained at U.S. ports. CBP's Forced Labor Enforcement Task Force has specifically flagged:

• Chinese seafood processing (particularly in Shandong province)
• Thai fishing vessels (documented by ILO and Human Rights Watch)
• Vietnamese aquaculture operations using bonded labor

The seafood Section 301 investigation would create a tariff remedy on top of the existing UFLPA import ban — meaning even compliant producers from targeted countries could face elevated duties regardless of their individual labor practices.

What This Means for Your Bottom Line

Let's put numbers on it. If you're importing $5 million annually in frozen shrimp from Vietnam under HTS 0306.17 (currently entering at the general rate of Free to 5%, plus applicable AD duties), a 25% Section 301 tariff would add $1.25 million to your annual landed cost.

For reference, the existing Section 301 tariffs on Chinese goods started at 25% in 2018 and now range from 25% to 100% depending on the product category. Seafood from China already faces multiple layers:

• General duty rate (0–5%)
• Antidumping duties (variable, reviewed annually)
• Section 301 List 1–4 tariffs (25% on most Chapter 3/16 products from China)

A new broad-based seafood Section 301 investigation could extend similar treatment to Vietnam, India, Ecuador, Indonesia, and Thailand — the countries that absorbed trade diverted away from China over the past seven years.

Timeline: How Fast Can This Move

Section 301 investigations follow a statutory process, but the timeline can vary significantly:

1. Initiation — USTR publishes Federal Register notice (could come within weeks given stated intent)
2. Public comment period — Typically 30–60 days after initiation
3. Public hearings — Usually 4–6 weeks after comment deadline
4. Determination — USTR has up to 12 months (can extend to 18) to reach a determination
5. Action — Tariffs can be imposed within 30 days of determination

But here's what importers miss: USTR can impose provisional measures during the investigation. And given that two parallel Section 301 investigations (forced labor + overcapacity) are already deep into their public hearing phases — the April/May 2026 hearings are happening right now — institutional capacity exists to move quickly.

The forced labor investigation's public hearings ran April 28 through May 1, 2026. Post-hearing rebuttal comments are due seven days after the last hearing day. A determination on that investigation could come by Q3 2026, establishing the framework for seafood-specific action.

What to Do Right Now: 5 Steps for Seafood Importers

1. Audit your supply chain exposure — Map every entry under Chapters 3 and 16. Identify which supplier countries are already targeted by existing Section 301 investigations (the 16-economy overcapacity probe or the 60-economy forced labor probe). Those countries will likely be first in line for seafood-specific action.

2. Model the tariff impact — Run scenarios at 25%, 50%, and 100% additional duty. If a 25% tariff makes your margins unworkable, you need contingency plans now, not when the Federal Register notice drops.

3. Diversify sourcing proactively — The countries not on the current radar: Norway, Iceland, Canada, Chile, New Zealand. Their seafood products generally carry the same HTS codes but wouldn't be subject to a country-specific Section 301 remedy. Start qualifying alternative suppliers before demand spikes.

4. Prepare public comments — When the investigation is formally initiated, USTR will open a public comment docket. If you can demonstrate that domestic supply cannot replace your imports, or that tariffs would harm downstream U.S. industries (restaurants, food processors), your comments matter. The deadline is typically 30 days after initiation — not enough time to start from scratch.

5. Review your classification — Some seafood products straddle classification boundaries. Is your product "prepared or preserved" (Chapter 16) or "fresh/frozen" (Chapter 3)? The distinction matters because Section 301 actions can target specific HTS subheadings. Ensure your entries are classified correctly — both to avoid paying duties you don't owe and to avoid penalties for underpayment if tariffs hit differently than expected.

What's Coming Next

Watch for these milestones:

• USTR response to the congressional letter — Likely within 2–4 weeks. If Greer responds favorably, expect a Federal Register notice within 30 days.
• Forced labor Section 301 determination — Expected Q3 2026. This will set the precedent for tariff rates and country targeting.
• Overcapacity Section 301 determination — Post-hearing rebuttals due mid-May 2026. Final determination likely Q3–Q4 2026.
• ITC final determinations on shrimp AD/CVD — Additional final orders expected through 2026, compounding with any Section 301 action.

The broader pattern is clear: the administration is rebuilding tariff authority through Section 301 after losing IEEPA. Each new investigation adds sectors and countries. Seafood's combination of political appeal (American fishermen), national security framing (food supply chains), and forced labor concerns makes it an almost certain target.

The Classification Challenge

For customs brokers managing seafood accounts, the biggest operational risk isn't the tariff itself — it's the classification complexity that multiplies when Section 301 actions layer onto AD/CVD orders.

Consider frozen shrimp from Vietnam: currently subject to antidumping duties (variable rates by exporter, reviewed annually in administrative reviews like the POR20 currently underway), general duty, and potentially a new Section 301 tariff. Each layer has different rules of origin requirements, different exclusion processes, and different protest timelines. Getting the classification wrong on even one element compounds across all layers.

TariffLens monitors these tariff developments in real time and flags entries where new duties may apply — so you're not finding out about a rate change from a CBP penalty notice.

This article is for informational purposes only and does not constitute legal, tax, or customs advice. Consult a licensed customs broker or trade attorney for guidance specific to your situation.