Jeotgal or jeot (젓갈 or 젓) is a salted fermented food in Korean cuisine. It is made with various seafood, such as shrimp, oysters, shellfish, fish, fish eggs, and fish intestines. Today I had a chance to try Changnanjeot (창란젓) – jeot made with pollock intestines, yum!
From Korea With Love 
Fermented Skate!