A Coral Reef is MADE by small animals the look like flowers.
These animals make tubes and shells to live in. The secrete a very hard material almost like concrete. This part of the animal is completely and totally dead. The rest of the animal, the fleshy part, is completely living.
When the animal dies, the hard part is left, and THAT is what we call "coral". Baby animals will attach to this dead part, and as they build shells the coral reef grows bigger.
Coral reef and trees
Coral can be dead if it has lost its living tissue and bleach, usually due to stress events like rising water temperatures. However, dead coral structures can still provide important habitats for other marine organisms.
The body covering of the blue coral are the a layer of tissue covering the skeleton and connecting the living polyps. The Living coral grow on the skeletons of the dead ancestors. This is how the reef grows.
Coral that is living.
A coral reef a water habitat, although the coral reef is alive it is only the very outside layer of coral that is living as all the under layers are dead coral.
Dead organisms that were living million / billion/S of years ago.
for a little while. But coral is thousands of tiny living organisms all stuck together, so they won't all die at once. One dead organism won't make the whole coral structure die, so there will still be color in the rest.
No because coral is not a living thing it is the tiny organisms living in side of it that make it living. these organisms are the reason coral grows as they build it around them.
There is no such thing as a non-living organism.
Coral reefs have a non-living component, in the form of a calcium carbonate skeleton, and a living component in the form of small animals called polyps, who secreted the skeleton. However, if the polyps die, you still have coral left over, so coral can be either living or dead.
They actually are called Coral. Because Coral are named for the "coral" that they leave behind.
Contrary to popular beleif, corals are animals. What you classically think of as corals are colonies of tiny organisms. These make up a coral. Many, many corals plus fish, crustaceans, echidnoderms and algae, make up a coral reef.