What is your first name?
What is your last name?
The Great Barrier Reef, the world's largest coral reef, extends from
the middle of Australia's east coast northward to Papua New Guinea. It
is not, however, one reef, but a system of around 3,400 separate
formations with a total area of more than 200,000 square miles.
The corals that create the reef are tiny creatures called polyps which
join together in colonies. Each polyp looks like a tiny blob of jelly with
tentacles, a bit like a sea anemone, but MUCH smaller. Each one lives in a
shell and joins together with other polyps in shells to form interesting and
varied shapes such as fans, antlers, plate shapes, and more.
There are actually many different kinds of coral. Some grow and die
quickly, while others grow slowly and can live for hundreds of years.
Corals can be many different colors; the algae they eat give coral their
color. When corals die, they turn white.
Coral grows best in shallow, warm moving saltwater with plenty of
light. The Australian coast offers the perfect growing conditions, which
have allowed the Reef to grow to such a large size. The Great Barrier
Reef is home to an estimated 300 species of coral, as well as 1,500
species of fish, more than 4,000 types of shellfish, over 400 kinds of
sponges, six turtle species, and more than 240 types of birds. The
dugong, an endangered plant-eating marine mammal similar to the
Florida manatee, is also found in the waters around the Reef, which
attracts many tourists each year.
Corals are NOT
All of these conclusions about the Great Barrier Reef are valid, EXCEPT
Which of these factors would MOST LIKELY have caused the dugong to become endangered?