These small freshwater crabs are found in great numbers in and around ricefields and flatlands turned into wetlands during the rainy season. Though they do not have much meat, they are caught and fermented in salt water, making a briny crab sauce for seasoning. They are then called boo (kem or boo kem), salted crab. The best part, though, are the crabs themselves, which are cut up into chunks shell and all, and added to salads, including the delicious Salted Crab Green Papaya Salad(Som Tam Boo Kem) – to this day my favorite rendition of this popular national dish. In Thailand they are called (Boo Kem or Bpoo Kem). Salted crabs (Boo Kem) are an ingredient foreign to many westerners.