Sponsored article by Anucha Kasun
Inside a Modern Seafood Processing Plant: From Boat to Shelf
A TUNA boat docks in Samut Sakhon at sunrise. By lunch, that same fish is cleaned, portioned, cooked, and sitting in cans on a pallet bound for supermarket shelves in Europe, North America, and the Middle East. That speed is the result of efficient and seamless choreography most shoppers don’t think about, but it’s what a modern seafood processing plant handles daily.
What happens on the floor
Raw catch turns up fresh or frozen, gets sorted by species and size, and moves through cleaning lines where scales, bones, and skin come off. From there, depending on the product, it’s cooked, smoked, or frozen, then canned or pouched for retail. Every stop along the way has a temperature log, and there’s a metal detector waiting at the end.
Plants tend to specialise. A shrimp facility runs on a completely different rhythm from a tuna cannery, and salmon smoking is a trade in its own right. Pet food and marine ingredient lines often sit under the same factory roof, but they operate on their own equipment and their own rulebook.
Scale is the other big variable. A small local operation might handle a few tonnes a day. Larger players, such as Thai Union in Samut Sakhon, run seafood processing plant networks that touch dozens of countries and supply private-label buyers alongside their own shelf brands, including Chicken of the Sea, John West, Petit Navire, King Oscar, and Sealect.
The quality checks shoppers never see
Ask a procurement manager and they’ll tell you the gap between an average plant and a great one is usually invisible from the retail shelf. HACCP plans get reviewed on a weekly cadence, third-party auditors from BRC, IFS, or BAP arrive on rotation, and traceability records are detailed enough that a can pulled off a Tesco shelf can be tracked back to a specific vessel and catch date.
Moreover, water quality gets tested, cold storage runs on backup generators, and hygiene training for line workers looks a lot like what you’d see in a hospital kitchen.
Sustainability also sits alongside food safety on the buyer checklist now. Buyers increasingly expect MSC certification for wild-caught seafood and ASC for farmed, along with clear answers on bycatch and what happens to trimmings. Most trimmings end up as fish meal, pet food ingredients, or marine collagen, so actual waste is minimal.
Why this matters for shelf price
Seafood processing rarely shows up in glossy brand campaigns, and it’s the reason a can of tuna costs a couple of dollars rather than twenty. The infrastructure supporting that low price, from refrigerated logistics and quality labs through to retort ovens and packaging lines, is the payoff of decades of investment from processors across Thailand, Vietnam, Ecuador, and Norway.
For a sense of how one operator runs shelf-stable seafood, frozen products, feed, pet food, marine ingredients, and packaging out of an interconnected seafood processing plant network, Thai Union’s business overview is a reasonable starting point.
