The fact that you didn't know about the coral reefs.

Coral reefs are very precious because there are so many animals in them and they have evolved over hundreds of years.
These coral reefs are being destroyed all over the world.
Coral reefs are sometimes mined by building materials.
The hills in the sea are sometimes buried in more fine soil than the broken sand.
Coral reefs are also polluted with sewage discharged into the sea.
Fishermen destroy coral reefs to catch fish for food and physiognomy.
They also carve coral reefs and sell them as souvenirs to tourists.
Mostly found in the warm, salty seas of the tropics.
Coral reefs are abundant throughout the South Pacific and around Madagascar Island on the southeast coast of Africa, the Indian Ocean, which stretches to the East Indies and Sri Lanka.  Coral reefs are also formed on the coast of Florida and Bermuda in the U.S. through the West Indies along the east coast of Brazil, a tropical region.
Coral reefs surrounding the volcanic island in the South Pacific are sentries.
Australia's Great Barrier Reef, which is about 2,000 kilometers long, is the largest coral reef in the world.


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