South Korea bought roughly USD 253 million of Vietnamese seafood in the first four months of 2026, up 2.75% year-on-year - equal to just under 7% of Vietnam's total seafood export value, according to VASEP figures reported in the trade press. That modest overall share hides a much sharper story underneath: one product category is pulling far ahead in this market, and a second is boxed in by a quota system that blunts the free-trade agreement's headline benefit.
Squid and octopus: the lane that's actually working
South Korea is Vietnam's single largest buyer of squid and octopus, and by a wide margin. In the first four months of 2026, Korea bought close to USD 42 million of Vietnamese cephalopods - up almost 23% year-on-year - and accounted for roughly 37% of Vietnam's total squid-and-octopus export value in that period. The pattern held through 2025 too: Korea took more than USD 100 million of Vietnamese squid and octopus in the first five months alone, about 36% of the category's total export value that year, as Vietnam's full-year cephalopod exports approached USD 760 million. Shipments into Korea are dominated by two forms - frozen cuttlefish and steamed octopus - both processed products, not whole raw material, which tells you Korean importers are buying finished or near-finished goods rather than inputs for further Korean processing.
Shrimp: same agreement, much weaker access
Shrimp tells a different story under the same Vietnam-Korea Free Trade Agreement (VKFTA), in force since December 2015. Most seafood lines clear into Korea duty-free under the agreement, but shrimp was carved out into a tariff-rate quota: Vietnam's duty-free allocation started at 10,000 tonnes a year and stepped up to 15,000 tonnes after five years, with anything above that quota facing a 20% tariff. The quota itself isn't allocated for free - Korean importers have to win it at auction, and that auction typically costs 14-16% of the import value. In practice, that auction fee eats most of the advantage the 0% tariff was supposed to deliver, which is why Vietnam's seafood trade group has pushed Korea to remove the quota system entirely rather than treat it as a solved problem.
Why the gap matters for how you plan a Korea program
If you're a buyer evaluating Vietnam-to-Korea seafood sourcing, the FTA headline ("0% duty") is doing a lot less work for shrimp than it appears to on paper, while it's doing exactly what it promises for squid and octopus. That's a structural difference, not a temporary one - the quota-and-auction mechanism for shrimp isn't something an individual factory or trading relationship can route around, and it isn't going away without a government-to-government renegotiation. Squid and octopus, by contrast, move through Korean customs clearance at the agreement's full 0% rate with no volume ceiling, which is a large part of why that category has grown into Korea's top import line from Vietnam rather than staying a niche.
What I'd tell a buyer building a Korea-facing sourcing plan
For a buyer building or expanding a Korea-facing sourcing plan, I'd treat squid and octopus as the category where Vietnam's cost position and the trade agreement are both working in your favor at the same time - worth prioritizing if your product mix has room for it, since Korean demand there has grown for two straight years running. For shrimp, I'd model the landed cost with the auction fee included from the start rather than assuming the FTA's 0% rate applies cleanly; a program that only pencils out at 0% duty will look very different once 14-16% of quota-auction cost is added back in. And if your Korea volumes are shrimp-heavy, it's worth asking your supplier or agent whether they're aware of a Korean importer's existing quota allocation before you commit container volume - sourcing around someone else's unused quota space is often more realistic than counting on new quota becoming available.
Sourcing frozen squid and octopus from Vietnam?
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