Another sour fishy soup that is popular in southern Thai cuisine is tom som pla krabok.
Overall, it's not quite as fiery as gaeng som, but it just might be one of the sourest soups that Thailand has to offer.
Every spoonful is a tongue smack of acidity that results in an outward frown, but internal delight.
Along with the delightful sourness, the soup is a fusion of turmeric root, shredded ginger and tamarind juice.