Show Me the Crab Yongsan is a family seafood restaurant in Seoul that serves crab, shrimp, and shellfish tossed in seasoning. Its signature boiling crab comes with butter garlic sauce and a choice of spice levels, along with mac and cheese, shrimp, and bongji bap. Staff clean the crab and seafood at the table so it can be eaten right away, and melon soda floats and blue soda floats are also available. The restaurant plays upbeat music and the space is casual.