text: Corals are polyps; most are colonial but some are solitary. Their bodies comprise the typical polyp structures, plus an exoskeleton that has a base and vertical septa that grow and are left below the body as the colony grows and the animals die.\nThe individuals may be connected by means of stolons and also have different appearances that are related to different functions (feeding, reproduction, fixation). The skeleton of a single polyp is called corallite.\n\nThis is a schematic drawing of a coral polyp:\nhttp://www.abc.net.au/science/news/img/environment/coralA270705.jpg\nAnother good one:\nhttp://www.arkive.org/coral/Coral/illustrations/coral_structure.jpg\nMore detailed, showing several corallites:\nhttp://www.sbg.ac.at/ipk/avstudio/pierofun/png/scans/coralit2.jpg\nTypes of coral morphology:\nhttp://www.sbg.ac.at/ipk/avstudio/pierofun/png/scans/coralit3.jpg