Sea intestines, also known as "sea chicken" in Jiaodong fishermen, the Chinese list ring cucumber Urechis unicinctus, commonly known as the sea intestines, the English name Chinese Penis Fish. in China only the Bohai Bay production, soft wriggling, body without burrs, light yellow. Some places people call it "naked sea cucumber", sea intestines not only look like naked sea cucumber, its nutritional value than the sea cucumber is not inferior. But for many years, people have used it as "bait". The history of using it to make food is not more than a few decades. It can be consumed by the general public and has the effect of warming the liver and kidneys, strengthening the yang and fixing the essence, which is especially suitable for men to consume. It is worth noting that when live sea intestines are gently squeezed in a dark environment, they will fluoresce in green color. Sea intestines belong to the annelids, the juveniles have segments, the adults have no segments.