By Amelia Keogh
Coral reefs grow to be huge. Read to find out the process of a coral reef growing.
Coral reefs are old
Coral reefs were alive way before humans. Some are almost 400 million years old.
The Great Barrier Reef
The Great Barrier Reef is the largest reef that ever existed. It is 1,250 miles long. It is in Austrailia.
Every coral reef grows five inches every year. Imagine how old the Great Barrier Reef is.
Coral reefs are really old. The Great Barrier Reef is over 15 million years old.