Wikipedy.com                                                                                           Online encyclopedia

   Home     Add article      About

 INDEX

 

Coral. Coral reef information for kids

Coral is a formation of limestone built up in the sea by millions of tiny animals called coral polyps. Each polyp is a jellylike animal that builds a cup of limestone around itself. As in anemones, to which corals are related, the mouth is surrounded by tentacles carrying stinging cells and used to paralyze prey.

Most corals live in colonies. The limestone cups, or skeletons, of the many individual polyps in a colony form a branching formation of limestone in the sea. As the polyps reproduce, so the formations get larger.

Picture of Coral reef - Coral reef information for kids Great Coral reef. Coral reef information for kids

Picture of Coral reef

Great Coral reef

Some formations can be delicate and lace-like. But others build into great coral reefs and atolls. Reef-building corals live only in the tropics, as they cannot survive in water with a temperature lower than 18° С (65° F). Other corals can be found in cooler waters. Many coral formations have beautiful colors. This is caused by the polyps themselves, and if the formation is removed from the water the polyps die and the color fades.

Coral reefs form at depths of not more than 150 feet and grow until they break the surface. There are three kinds of coral reefs. Fringing reefs are found along a shore, extending only half a mile out to sea. Barrier reefs are situated offshore, separated from the land by a deep channel (as in the Great Barrier Reef along the east coast of Australia) or a lagoon, which may be many miles wide. Barrier reefs are mostly found around small islands in the ocean. Coral atolls are great ring-shaped reefs. Coral islands form when sediment and debris build up on a barrier reef or atoll.

Coral reef information Coral reef information

Coral reef information for kids: The structure of a single coral animal and the method of budding that produces new polyps. Below: Two corals - Organ-Pipe Coral and Brain Coral

Coral reef information

Coral reef information for kids: A simplified section across the Great Barrier Reef of Australia shows how a faulted area has submerged and formed a suitable platform for coral growth. The barrier reef is in fact a complex series of smaller reefs

You can read these articles also:

Free online world book encyclopedia

Copenhagen

Cook, James. Captain James Cook death

Coral reef information for kids and adults

Calvin Coolidge birthplace etc.

Cork

Cooper, James Fenimore

Corrosion

Copper. Facts about the element copper

Name, facts about my name

 
 

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

 
   
   
 
 
   
 
   
   
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 
       

Wikipedy.com @ - Online Encyclopedia