Aragonite, a carbonate mineral.
Cacite
Coral are animals because they have little animals called crynoids growing inside them. Each one has a shell and all the shells stick together to form the coral.
Any kind of material in the water, whether it's sand, debris, whatever.
A sedimentary rock called coquina.
Homes? Most just swim around but some live in shells, rocks and/or come on land to rest.
The bulk of marine skeletal remains are composed of the mineral calcite. Some marine organisms also have shells of aragonite or silica.
A sedimentary rock called coquina.
Limestone is made up out of fossils of corals and shells from the water.
Any Type Of Limestone
It can be formed in this way, or it can be formed from calcite precipitation (mineral formation from saturated solution).
Yes, coral reefs are made of the limestone skeletons of deceased corals - the living corals are on the surface of the reef.
starfish, seaweed, corals, sponges, algae, sea-shells.