Wikipedia
Gejang or gejeot is a variety of jeotgal, salted fermented seafood in Korean cuisine, which is made by marinating fresh raw crabs either in ganjang ( soy sauce) or in a sauce based on chili pepper powder. The term consists of the two words; ge, meaning "a crab", and jang which means "condiment" in Korean. Although gejang originally referred only to crabs marinated in soy sauce, it has begun to be called "ganjang gejang" these days to differentiate it from yangnyeom gejang . The latter is relatively a new dish that emerged since the restaurant business began to thrive in South Korea. "Yangnyeom" literally means "seasoning" or "seasoned" in Korean but refers to the spicy sauce made with chili pepper powder.
Gyeongsang, Jeolla, and Jeju Island are famous for their own characteristic gejang. It is a representative speciality of Yeosu in South Jeolla Province, and a traditional Jeolla cuisine dish.
According to the poll by foreigners visited to Korea, The most difficult to eat Korean cuisine is gejang because the red color dish is too hot and salty.