Each coral head consists of thousand of individual polyps.

These polyps are continually budding and branching into genetically identical neighbors.

Some species have the polyps budding directly off the stolon which roots the colony.

In most cases the positive result is just due to hemorrhoids however, it can also be due to diverticulosis, inflammatory bowel disease (Crohn's disease, ulcerative colitis), colon cancer, or polyps.