Endoscopic examination reveals a rectal polyp, rectal mass, or, less commonly, a rectal ulcer. Bleeding may occur at the site of a biopsy or polyp removal. Adenoma is the most common colorectal polyp. The polyp itself represents an overgrowth of the mucous membranes. In December 1965, he was supposedly diagnosed with a bleeding polyp in his large intestine. Polyp prey includes copepods and fish larvae. He underwent an operation to remove an intestinal polyp in Jeddah in 2005. The cubozoan polyp then eventually metamorphoses directly into a Medusa. During the appointment, the doctor and nurse spot a large "polyp" in his intestinal tract. Cnidarian sexual reproduction often involves a complex life cycle with both polyp and medusa stages. The major benefit for using coral farms is it lowers polyp and juvenile mortality rates. Surgical intervention involves removing the polyp from the vocal fold. Treatment consists of simple removal of the polyp and prognosis is generally good. Some, however, omit either the polyp or the medusa stage. Each polyp excretes an exoskeleton near the base.