Fish sauce

What is Fish sauce?

Fish sauce is a thin, watery liquid seasoning prized for its savory depth. It ranges in appearance from golden amber to reddish brown. While briefly fermented batches carry a sharp fish smell, extended aging softens the scent into a richer, nuttier aroma. The sauce tastes intensely salty and savory due to natural glutamates released during fermentation. Unlike oyster sauce, which is thick and sweet, genuine fish sauce is clear, salty, and fluid, prepared without added starches.

Where does Fish sauce come from?

Fermented fish seasoning has ancient roots in both Asia and Europe. Chinese texts recorded fish and meat sauces over two millennia ago during the Zhou dynasty, though China later shifted largely toward fermented soybean seasonings. In Southeast Asia, fish-based condiments flourished. Ancient Mediterranean cooks also made extensive use of fish sauce. Greeks fermented scraps into garos, while Classical Romans produced garum by fermenting salted mackerel viscera in the sun for several months across coastal outposts in Spain and Portugal.

How is Fish sauce made?

Small, oily species such as anchovies, mackerel, or tiny krill are mixed with coarse salt at levels between ten and thirty percent. The salted mixture is sealed inside wooden vats or closed containers to ferment, sometimes for up to two years. Liquid that drains from the first aging process forms the highest grade, often called the first press. Secondary grades are sometimes produced by boiling or re-steeping the leftover fish mash with brine, then coloring it with caramel or roasted rice.

How and when is Fish sauce eaten?

Cooks use the sauce as a versatile table condiment and an all-purpose seasoning in the kitchen. In Southeast Asia, small saucers of it accompany daily meals. Thai tables frequently feature it sliced with bird's eye chilies and lime juice, drizzled over noodle soups and stir-fries. In the Philippines, the liquid is served alongside fried fish or stirred into sour sinigang soups and hot bowls of rice porridge. It also forms the foundation of sweet and tart dipping sauces.

Kinds of Fish sauce

Regional styles differ in fish choice and boldness. Cambodian and Thai varieties tend to be lighter and less pungent than Vietnamese nước mắm, which is judged by its nitrogen content and amber clarity. In the Philippines, patis is skimmed from vats of fermenting fish or krill paste and typically cooked before eating. Cambodian makers sometimes blend anchovies with fish roe or mix finished sauce with crushed roasted peanuts and citrus for dipping. Ancient Roman garum was often cut with wine, vinegar, or honey.

What Fish sauce means

Fish sauce serves as a bedrock of daily culinary identity across coastal Southeast Asia. In Vietnam, Phan Thiết celebrates its heritage as a historic center of barrel-aged production with a dedicated museum, while island producers on Phú Quốc remain celebrated for their craft. Food historians note an ancient divide across Asia, where northeastern regions favored fermented soy condiments while southeastern communities built their daily food around preserved fish extracts.

Questions people ask about Fish sauce

Good reading and sources

• Encyclopaedia BritannicaArticle
• Language Matters | How ketchup was invented in southern China in 300BCSouth China Morning Post, Article

• Fish sauce on WikipediaEncyclopedia
• More photos on Wikimedia CommonsPhotos
• Wikidata recordOpen data