coral

 


                                                            what is corals 

Corals are marine invertebrates that belong to the phylum Cnidaria's class Anthozoa. They are rainforest of marine . Reef-building coral species such as those found in tropical oceans release calcium carbonate to create a strong skeleton. Zooxanthellae and polyps are two examples of the two main species that coexist and form a symbiotic relationship with one another. The interaction between zooxanthellae, an algae that uses sunlight to produce food by autotrophic means, and polyps, which share shelter with zooxanthellae algae, is known as a symbiotic association. This two organisms are tiny microscopic we can not see directly through our eyes. Hence we utilize Microscope for view. Another specialty was they make calcium carbonate secretions to create a rigid skeleton. That's a great importance of this reef builder. there are three types of reefs. fringing reef, barrier reef, atoll reef. More than TWO types of classification of corals, a) Hard corals b) Soft corals. Hard coral polyps secrete the skeletons of calcium carbonate (limestone), which will eventually turn into rock. Species like brain coral and staghorn coral are examples of hard coral.

coral
one types of coral as Acropora sp.
    


                another kind of corals Montipora spp.



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