88 

 

 How are Corals formed ? Give some Examples. 



By felting together of the spicules to form tubes (e.g., 

 Tubipora, the Organ-pipe coral), by fusion of the spicules 

 to form a supporting axis (e.g., Corallium, the Red Coral), 

 and by an accretion of lime about the base of the body 

 (e.g., the colonial sea-anemones of the Order Madreporaria 

 form the well-known hard cup-shaped corals of the coral 

 reefs). 



