Tourism is a huge industry for the Great Barrier Reef. It is estimated that more than two million people visit the reef each year. The economic effect of tourism brings in an average of 5 billion AU dollars per year for Australia. This photo shows an underwater view of the coral structure of the Great Barrier Reef - can you find the three differences in this photo hunt puzzle?
Some of the most popular tourist activities are tour boat cruises coupled with snorkeling and scuba diving. Tourism also is seen to have a negative impact on the Great Barrier Reef.