Continued from the second part...
Human carelessness has done a great deal of damage to coral reefs. Many careless divers touch, stand on or kick live corals, killing them. Boaters also kill polyps by dropping their anchors on the corals.
Water pollution makes it impossible for corals to survive in it. Sometimes, boats leak oil or gas into the water. Cans, bags of garbage, plastic bottles and fishing nets are often thrown overboard. Chemicals and sewage are also dumped into the water.
Over-fishing is a threat to the reef community. When people take too many of one kind of fish, They upset the balance of the reef ecosystem. Many of the fish are taken to be sold as pets.
adapted from life in the coral reef
Done by Tabigail Hung
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