This Paksiw na Galunggong Recipe is done by cooking fish in vinegar broth along with other ingredients. This Paksiw na Galunggong Recipe makes use of the Philippines galunggong fish (round scad in English).
This video shows another way of cooking paksiw na galunggong.
Find it online: https://pilipinasrecipes.com/paksiw-na-galunggong-recipe/