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Corals are hard because the individual animals, called polyps, each secrete calcium carbonate which hardens into a shell around each polyp.

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13y ago
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14y ago

Corals don't become hard when they die.

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11y ago

coral reef skeletons

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Q: What is the substance that make a coral reef hard?
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Related questions

How does a coral reef get its coral?

The hard coral polyp makes the coral


Is coral a producer in the coral reef?

Zooxanthellae. They are tiny plants that make coral.


What are some ideas of coral reef dioramas?

a coral reef idea is to be creative work hard and use paper and some house material


How do you make a corral reef?

actually you cant make one the earths oceans carve each coral reef form the wild waves and the roaring winds the coral has no chance of not carving into the beautiful coral reef


What is the collective noun for coral?

The collective noun for coral is a reef of coral or a bed of coral.Although the plural form, corals, is the correct form for the living creatures themselves, the part that of the coral that is seen, the reef or the substance from which things are made, is an uncountable noun, a word for a substance. There is no collective noun for the live creatures.


What is a producer in the coral reef?

Zooxanthellae. They are tiny plants that make coral.


How many species of coral are there in the Great Barrier Reef?

Lettuce Coral, brain coral, elkhorn coral, staghorn coral, star coral, fire coral, sea pen, scroll coral, golfball coral, mustard hill coral, rose coral, sea whips, maze coral, rigid cactus coral, orange cup coral.... and many more.


What does a coral reef do?

A coral reef is a plant in the ocean that can produce food for animals.It also can be a home.Even clownfish live in coral reefs.Ever seen the move "Finding Nemo"?Well Nemo and his dad live in a coral reef!


Is the great coral reef the same as the Great Barrier Reef?

No. A coral reef is just a reef made out of coral. There are many other kinds of reefs. A coral reef is just one kind. The Great Barrier Reef is a specific coral reef. There are many other coral reefs in the world.


What type of site is the Great Barrier Reef?

The Great Barrier Reef is a coral reef.


Where do needlefish live?

in the coral reef in the coral reef


Did fish make the Great Barrier Reef?

no, the great barrier reef is the biggest coral reef in the world and started as all coral reefs did, with a small bit of coral. it has since grown heaps and is still growing.