Sustainable Seafood & Sourcing on Koh Phangan

"Sustainable" is the least reliable word on a Thai menu. It costs nothing to print and almost nobody is asked to justify it. So before anything else, here is what this guide is not: it is not a claim that we have solved anything, and there are no carbon figures in it.

What follows is what is actually knowable about seafood on this island, and what we can state about our own sourcing without inventing numbers.

Wild-caught is not automatically better

This is the part most restaurant marketing gets wrong, ours included until we thought about it properly. "Wild-caught" tells you the fish was not raised in a pen. It tells you nothing about whether the stock is healthy, or how it was caught.

A bottom-trawled wild fish — dragged up in a net that scrapes the seabed and takes everything with it — can carry a far heavier environmental cost than a well-managed farmed one. Conversely, a great deal of aquaculture in this region is poorly regulated, sited in cleared mangrove, and reliant on antibiotics and wild-caught feed fish.

So the honest position is: wild versus farmed is a useful question, not a verdict. Method and stock matter more than either label.

The shrimp question

If you ask one thing in any restaurant in Thailand, ask about the shrimp. Thailand is one of the largest shrimp-farming nations on earth and pond-farmed shrimp is the default almost everywhere. That is not a scandal — it is an industry that feeds a great many people — but it is worth knowing, because it is the single biggest gap between what diners assume and what is on the plate.

What is actually swimming here

Order the fish nobody orders

The most useful thing a diner can do here costs nothing and requires no research: order something you do not recognise. Barracuda and mackerel are abundant, land daily, cost less than snapper, and go largely unordered because they are unfamiliar. Every table that orders the same three species concentrates pressure on those three species. A menu that changes with the boats is a feature, not an inconvenience.

Two questions worth asking anywhere

The land-meat question

This is the one area where the evidence is genuinely settled rather than contested. Across decades of research, land-based livestock — beef and lamb especially — carry substantially higher greenhouse gas, land-use and water burdens than plants, and than most seafood. It is not a close comparison, and it does not depend on which study you prefer.

Seafood is the more complicated case, which is why most of this guide is about it. But if you are choosing where to eat on environmental grounds, the presence or absence of beef on the menu tells you more than any sustainability paragraph on the back page.

Frequently asked questions