A shrimp tie (also known as an ebi or a kuri) is a type of Kinbaku bondage. It originated over 300 years ago in Japan as a torture and interrogation technique. Due to the forced bent down position of the upper body this stress position sends a burning sensation through the body if the subject remains in it for a long time.
Due to the knees which are widely spread the position resembles the legs of a crab or shrimp.
Reverse shrimp tie
Knees are bound inward to further restrict movement The ankles are tied to the neck instead of the chest harness The subject lies on his or her belly and the ankles are drawn to the back, similar to hogtie bondage. This position is known as gyaku ebi, or reverse shrimp tie. All variations have the crossed position of the ankles in common.