black corals
Stone coral is the most well-known, most widely distributed species, or groups of single life. And black corals and coral thorn, divide the number of 6 or a multiple of 6, simpler and less of a feathered tentacles. Stone coral, black corals and coral and a thorn relationship of the difference between the anemone is a major bone.
Stone coral found in all oceans, from tidal zone to 6000 meters (about 20000 feet ). Main type of group life, the Hydra diameter 1 to 30 mm ( 0.04 to 1.2 inches).
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The majority of living stone coral for the light yellow, light brown or olive, according to live in coral and algae on the set. But its skeletal constant white. Blue coral ( Heliopora is the largest single battalion body living stone coral as a Shi Zhi L. ( Fungia ) animals, up to 25 cm in diameter ( about 10 inches ).
Stone coral skeleton of a goblet, wrap the hydra, its composition almost pure calcium carbonate. Its growth rate depends on the age, food supply, water temperature and different types. Annular Coral Island and coral reefs from the stone coral skeleton form,south sea pearls
its formation rate to an annual average of about 0.5 ~ 2.8 cm. Common types include agate stone coral coral, mushroom coral, coral and staghorn corals stars, their patterns are named.
Black corals and coral thorn a whip, pinnate, tree or brush-ruping, distributed in the Mediterranean, West Indies and Panama coastal waters.
Because of the pollution of the environment, leading to the air of a coral easy die components, appeared in some coral area, therefore, the global coral species and drastically reduced the number of.
The Persian name
Persian: xuruhak
Growth environment
Growth at a temperature above 20 DEG C of the equatorial and tropical, subtropical regions near the water depth is 100-200 meters, golden south sea pearls calm and clear reef, platform, slope and cliff face, concave seam. Mainly in the mediterranean.
Basic structure
Coral body made up of 2 layers : the layer of cells located on the outside of said ectoderm; inside the cell layer called the endoderm. Inside and outside the two germ layers are very thin, no coral cell structure of layer. This kind of animals without head and trunk branch, without a central nervous system, only the diffuse nerve system. When be stimulated by the outside, the whole animal body has reaction. Its way of life for free floating or fixed bottom habitat. Living coral, life in the ocean.