Yes it gathers up shells and fish smaller then your pinky finger nail help.
Limestone is often sedimentary, formed of calcite in the form of shells and coral. So it's found where there used to be an ocean.
No. The coral reef is formed by polyps.
A coral polyp is an individual coral cell, and when polyps stick together, they form coral a.k.a. Coral Polyp Colonies. Later, when the polyps die, their skeleton (which is like a hard shell) Strengthens the coral formation.
When coral polyps die, their exoskeletons are left for new polyps to build upon. Over long periods of time this process creates reefs.
Yes, coral does have exoskeletons made of calcium carbonate. These exoskeletons provide structure and support for the coral polyps, which are tiny organisms that secrete the calcium carbonate to build the coral reefs. Over time, these exoskeletons accumulate and form the large coral reef structures we see in the ocean.
Lakshadweep is made from tiny marine animals known as polyps. The skeleton of these creature after they die are known as coral. Since Lakshadweep contains many polyps it is known as coral islands
Coral polyps create the large hard structures known as coral reefs. The coral grows due to the build up of calcium carbonate that the corals secret.
Deep ocean deposition is the norm for the bulk of limestone formation, although seepage in caves also creates limestone structures, as well as shallow water coral reefs, and hydrothermal surface structures.
Reef cementing is done by coral polyps whose 'homes' are tiny cavities in the coral that they create.
Coral reefs are built by millions of coral polyps, small colonial animals resembling overturned jellyfish. They excrete an exoskeleton made of calcium carbonate, which forms their distinctive shapes as a colony. Thousands of coral colonies build up over time to form the reef. After an extensive period of time, the reef may die off, perhaps because the conditions of the environment change for the worse for the corals. Since reefs often form in conditions where there is a lot of water movement (because the water is more oxygenated in these areas), if the colony is no longer being sustained by living polyps the colonies break up. Reefs can still break up when the coral is still alive if the conditions are severe. Sedimentation and cementation occurs as calcium carbonate precipitates out of the water and of the exoskeletons of the coral.
basic answer, they suck up calcium and other elements from the water to build their skeletons. when they die, another coral builds upon the dead skeletons.
The ocean