Fish sauce - a sauce obtained from small fish that has been subjected to the fermentation process in the marinade. It has a specific smell. Fish sauce is used in many cuisines of Southeast Asia, especially Thai, Filipino, Vietnamese. In southern China, soups and casseroles are seasoned with fish sauce. In Southeast Asia, fish sauce is often made from anchovies, it has a rather sharp taste, so the sauce is diluted when consumed. Anchovies with salt are placed in wooden boxes where they are fermented and release salted liquid.