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It cause by the volcano erupt
A volcanic island or underwater mountain forms via volcanic activity. This allows a surface near the water surface for corals to attach too. The corals form a ring around the volcano.
The opposite of an island (land completely surrounded by water) is a peninsula. A peninsula is a piece of land that is almost entirely surrounded by water but is connected to the mainland by a narrow strip of land.
soft corals live deeper water than hard corals because soft corals do not create a hard outer skeleton as the hard corals do.
No corals live on the ocean floor, they live in shallow seas, i.e. near contiental shelves, or coral atolls like in Hawai'i were the islands have eroded just below sea level where shallow warm waters are prime for coral growth.
Corals are plants.
Corals are not decomposers. They are consumers.
Hermatypic corals contain zooxanthellae (a symbiotic algae), whereas ahermatypic corals do not. It is like saying that hermatypic corals are photosynthetic, where ahermatypic corals are non photosynthetic.
No, corals are not edible.
Yes, corals are composed of an exoskeleton
dynamite fishing and muro ami can destroy corals so if there are less corals, less corals will be produced.
No corals doesn't eat zooxanthellae they only eat zooplankton. Zooxanthallae helps corals to live and keeps corals colourful.They live on the coral polyps.