Referring to Pla Ra.
Pla ra (ปลาร้า), sometimes called pla daek (ปลาแดก) in some Northeastern provinces, is a type of fermented fish used in Thai cuisine. It is an ingredient included in most dishes in the Northeast region of Thailand, or Isan. This ingredient is made by fermenting freshwater fish, such as gourami, snakehead, catfish, or small fishes, with salt and rice bran or roasted rice powder in a closed container for at least six months.