Coral reefs are some of the largest living structures on Earth. Coral reefs are actually animals, despite their stony appearance. They start as little organisms called polyps that are only a couple of inches in diameter. They grow about a half an inch a year until they are hundreds of feet wide and stretch for miles, like the Great Barrier Reef off the coast of north-eastern Australia.
Thousands of species of fish and other small organisms inhabit the Great Barrier Reef. It is home to small fish, and plants like clownfish and anemones. However, it is also home to many predators like the barracuda, a large fish with razor-sharp teeth. All of these creatures live together in peace and harmony. Nature, however, is being disturbed.
Coral reefs are diminishing in numbers about four times as fast as rain forests are dying. global warming is making the ocean water too warm for coral reefs to survive. Water pollution and boats crashing into reefs are killing thousands of marine life and Coral reefs. You can usually tell if a coral reef is dying if it is turning pale or if it is being overgrown by seaweed. However we can stop the killing of all this sea life. Stop polluting water and save coral reefs.