Jeongseong Deumppuk Jeju Guk is a fish-soup restaurant near Jeju Airport that serves gakjaegi guk, jangdae guk, hairtail guk, and mel twigim. The signature gakjaegi guk is a clear broth with horse mackerel, and the mel twigim is deep-fried anchovy. Order your food when you take a number ticket and it comes out faster, and take banchan from the self-service corner. At lunch there is a 20-30 minute wait, and parking is difficult because the alleys around the restaurant are narrow.