| A zoarium with its included polypides is finally produced from the young polypide by the rapid development of buds. |
| The internal living parts of each zooid i.e., the nervous and muscular systems, the tentacles, and the digestive tract are called the polypide. |
| The polypide degenerates periodically during the lifetime of a zooid, and a compact mass, called a brown body, frequently remains in its place. |
| This requires that all zooidal walls grew independently of the rhythm of feeding polypide cycles. |
| As metamorphosis proceeds, larval organization degenerates, and the first polypide develops inside a primary zooid. |
| Cells from the surface epithelium push inward to produce the polypide, and the septa create a chamber around it. |
