Shrimp & Prawns

Shrimp is the most valuable seafood commodity in international trade, and unlike almost everything else in the sea it is mostly farmed. Ponds, not boats, supply the bulk of it, which turns shrimp from a fishery, with all the quota and stock-assessment problems that implies, into something much closer to intensive livestock: stocked, fed, harvested on a cycle, and vulnerable to disease. That single fact explains why shrimp has grown while wild fisheries have plateaued, and why its price shocks come from pathogens and feed costs rather than from catch limits.

First, the name, because this page carries both words and the trade uses them interchangeably. Biologically they are different suborders. Prawns are Dendrobranchiata: branching gills, pincers on three pairs of legs, and overlapping body segments that leave the animal fairly straight. Shrimp are mostly Caridea: plate-like gills, pincers on one pair of legs, and a second abdominal segment that overlaps both its neighbours, which forces the familiar curl. The distinction is real and completely useless commercially, because the giveaway is the gills, which nobody sees and processing removes. In practice the words track market convention and size: American English calls almost everything shrimp, while British, Australian, and Indian usage calls the bigger ones prawns. The irony worth keeping is that the farmed animal at the centre of this market, the penaeid, is a Dendrobranchiate, so the thing the world trades as "shrimp" is technically a prawn.

Second, what a pond actually is, since the word does most of the work on this page. A shrimp pond is not in the sea and not in a river. It is a man-made earthen basin excavated on flat coastal land, typically in the intertidal zone, on former mangrove, tidal flat, or salt pan, and filled with brackish water pumped in from an estuary or tidal creek. A typical pond is a few hectares of open water only about a metre or so deep, with an earth bottom, paddlewheel aerators pushing oxygen through it, and a gate to drain it at harvest. Postlarvae from a hatchery are stocked in, fed a formulated pellet for a few months, and the pond is drained and refilled for the next cycle. This is why shrimp behaves like intensive livestock rather than a fishery, and it is the opposite of the other farmed seafood on this site: salmon is grown in net pens moored in the open sea, whereas shrimp is grown in what is effectively a shallow field of salt water. It is also why mangrove destruction is the industry's defining environmental charge, because the ponds were dug where the mangroves were.

The dominant story of the last two decades is Ecuador, and the numbers are extraordinary. Ecuadorian shrimp exports went from roughly 40,000 tonnes in 2000 to about 1.2 million tonnes in 2023, a thirtyfold expansion, and reached 7.5 billion dollars of exports in 2025. Ecuador is now the world's largest shrimp farming country at around 1.3 million tonnes, ahead of India and China. India is the second exporter at roughly 700,000 tonnes, aimed heavily at the United States. Vietnam, Indonesia, and Thailand fill out the trade.

Why Ecuador won is worth setting out, because it is not the obvious answer of cheap labour. Four things compound. The first is geography: the estuarine delta country around the Gulf of Guayaquil offers enormous areas of flat coastal land at the right salinity, and sitting on the equator it is warm all year, so ponds run continuous cycles instead of shutting for a winter. The second is stocking density. Ecuador farms extensively, fewer animals in bigger ponds, which lowers yield per hectare but also lowers the stress, waste, and pathogen pressure that make intensive Asian systems fragile, and it needs far less antibiotic. The third, and the one people miss, is that Ecuador's advantage was bought with a catastrophe. White spot syndrome virus tore through the country in 1999, exports collapsed and many farmers went bankrupt, and the industry rebuilt by breeding from the survivors of those pond die-offs. Over two decades that produced shrimp lines genetically tolerant of the virus. Asia took the opposite road, breeding specific-pathogen-free stock and defending it with biosecurity, which works beautifully until a pathogen gets in. When Early Mortality Syndrome arrived from 2009, the clean-stock model broke and the tough-stock model held. The fourth is prosaic but real: that same 1999 crisis was part of a national financial collapse that led Ecuador to dollarize in 2000, so an export industry that earns dollars has since run without currency risk.

A single species does most of this. Pacific white shrimp, Litopenaeus vannamei, displaced the older black tiger prawn almost everywhere because it grows fast, tolerates crowding and a wide salinity range, and, decisively, could be bred as specific-pathogen-free stock. The industry effectively domesticated one animal and standardised on it, which is why shrimp farming looks more like broiler chicken than like fishing. It also concentrated the risk: a monoculture of one species across three continents is exposed to any pathogen that learns to exploit it.

Disease is therefore the defining supply risk, and it has repeatedly rewritten the map. Early Mortality Syndrome, a bacterial disease also called acute hepatopancreatic necrosis, devastated Asian production from 2009 onward and was a large part of why Thailand lost its lead. White spot syndrome virus has done similar damage across decades. Because farms are dense and stocked from shared hatcheries, an outbreak propagates through a producing country in a season, and the world price responds. There is no equivalent shock in a grain market: the closest analogue anywhere in this book is avian influenza in poultry.

Shrimp also carries a heavier load of regulatory and reputational risk than most foods. Antibiotic residues trigger border rejections, particularly into the European Union and Japan, and a single detection can suspend an exporter. The United States runs long-standing antidumping duties on shrimp from several origins, so the delivered price into the largest premium market is partly a legal outcome. Mangrove destruction to build ponds is the industry's central environmental charge, and labour abuses in processing have drawn sustained scrutiny. Certification schemes exist to manage all of this, and they function as a second, parallel specification alongside size and species.

Pricing is entirely cash and specification-driven. A shrimp price is meaningless without the species, the count per pound (the size grade, and the single most important price variable), whether it is head-on or headless, shell-on or peeled, raw or cooked, and the origin. Reference prices come from the Urner Barry quotations in the United States, from published Ecuadorian and Indian export prices, and from delivered quotes into Japan and Europe. After the Minneapolis failure there has been no serious attempt at a futures contract, and the industry hedges, insofar as it does at all, through forward sales contracts and by managing feed cost.