Coralogy is a subject that gives information about biology of coral, there are morfology and taxonomy; reproduction and respiration which are known as physiology;    and the last is coral’s habit, such as their activity with their symbion, and their feeding habit.  Yesterday, i taught this subject, and we discussed coral’s symbion and their relation with coral.  Coral has two kinds of symbion, namely intracell symbion and extracell symbion.

Intracell symbion is a symbion that lives inside the cell of coral.  The most popular intracell symbion of coral is zooxanthellae, marine algae that is classified as dinoflagellata.  Zooxanthellae do their photosynthesis by using carbon dioxide which is produced by coral respiration activity. Moreover, coral can save its  energy for feeding, inasmuch as coral obtains few energy that is generated from zooxanthellae’s photosyntesis process. The relation between zooxanthellae and coral is known as mutualism symbiosis.

Extracell symbion is a symbion that lives outside the cell of coral.  There are diverse categories of them, scilicet: fish, reptile, marine mammals, and invertebrate. Fish, that live around coral reefs are divided into three catagories, depending on their food, namely: hebivore, carnivore, and the last is omnivore.  The only one genus of reptile that lives in coral reefs ecosystem, is sea turtle, while there are two types of marine mammals live there, namely: Dugong and Dolphin. The last is invertebrate, the biggest classification of coral’s extracell symbion, which contain several phylum, such as: molusc, crustacea, echinoderm, and polychaeta. There are three kinds of symbiosis types that happen between corals and extracell symbion, namely: mutualism, parasitism, and komensialism.

These pharagraphs told that i taught about coral’s symbion and their types of symbiosis, yesterday.  There are two kind of coral symbions, namely intracell symbion and extracell symbion, furthermore there are three types of symbiosis that happen in coral reefs ecosystem, namely: mutualism, parasitism, and komensialism.

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