all about coral reefs

2. What are coral reefs and where are
they found?
• Coral reefs are diverse underwater
ecosystems and are built by colonies of
tiny animals and stony corals.
• Coral reefs can be found in three of the
earths oceans that contain part of the
tropics.

3. What are the three main threats to
coral reef eco systems?
• Fishermen put cyanide in the coral reefs to
poison fish and catch them.
• Sewage promotes the growth of algae which
harms coral reefs.
• Boats dropping anchors can severely damage
reefs.

4. What does a coral reef food web look
like?
• A coral reef food web looks like this: