Tropical hard ... Mushroom corals

Hard Corals are extremely complex to study. Four major types of hard corals include Staghorn corals, Brain corals, Mushroom corals and Porites corals.

Mushroom corals are easy to recognise having the strongly ridged structure. They are called Agaricae.

 

 

 

 
mushroom  
Brain corals You can see the polyps out feeding at night. Each polyp is catching prey. You can see the elevated rim of the polyp and its central mouth.
   
Favia coral Brain corals have larger furrowing cement homes. These complex corallites are inhabited by several polyps. Their large surface area collects sunshine to facilitate the photosynthetic activity of the tiny zooxanthellae growing within each polyp.