Thursday, 21 October 2010

Life on coral reef

Coral is a type of chalky rock.It is made up of the hard skeletons and the living bodies of millions of tiny coral animals that live in warm shallow tropical seas.Coral exists in many different shapes and colours.After many years the corals knit together to form huge ridges or reefs.The great barrier reefs off the coast Australia is 2,000km (1,250 miles)long.

Sometimes the corals build up to form island circular reefs called atolls.A coral reef is home to countless beautiful  and unusual fish and plants.

1 comment:

  1. This is good article, and nice pictures too ... but next time better put the reference book or internet link that you took from.

    ReplyDelete