See text The filefish (Monacanthidae) are a diverse family of tropical to subtropical tetraodontiform marine fish, which are also known as foolfish, leatherjackets or shingles.The pelvis is articulated with other bones of the "pelvic girdle" and is capable of moving upwards and downwards in many species to form a large dewlap, which is used to make the fish appear much deeper in the body than is actually the case.Some filefish erect the dorsal spine and pelvis simultaneously to make it more difficult for a predator to remove them from a cave.There is marked sexual dimorphism in some species, with the sexes possessing different coloration, different body shapes, and the males with larger caudal spines and bristles.Filefish are often observed drifting head downward amongst stands of seaweed,[4] presumably in an effort to fool both predator and prey alike.It is typically dried and made into a sweet and salty jerky called jwipo (Korean: 쥐포), which is then roasted before eating.