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Coral skeletons are biocomposites (mineral + organics) Ca carbonate, in the form of calcite or aragonite. In scleractinian corals, "centers of calcification" and fibers are clearly distinct structures differing with respect to both morphology and chemical compositions of the crystalline units.
[28] High failure rates afflict many stages of this process, and even though millions of gametes are released by each colony, few new colonies form. The time from spawning to settling is usually two to three days, but can be up to two months.[29] The larva grows into a polyp and eventually becomes a coral head by asexual budding and growth.
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Corals are marine invertebrates within the class Anthozoa of the phylum Cnidaria. mais info They typically live in compact colonies of many identical individual polyps. Corals species include aqui the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton.
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The scleractinian corals filled the niche vacated by veja mais the extinct rugose and tabulate species. Their fossils may be found in veja mais small numbers in rocks from the Triassic period, and became common in the Jurassic and later periods.
The most popular kind of coral kept is soft coral, especially zoanthids and mushroom corals, which are especially easy to grow and propagate grupo coral in a wide variety of conditions, because they originate in enclosed parts of reefs where water conditions vary and lighting may be less reliable and direct.
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