Environment Minister Greg Hunt has ordered an ''immediate'' inquiry into the agency charged with protecting the Great Barrier Reef, after revelations that board members held interests in companies that could benefit from expanding coal and gas production near the reef.

The revelations come as the Great Barrier Reef faces growing threats to its existence. Massive coal ports are planned along the Queensland coast, which environmental groups predict will have devastating effects on the reef.

The Great Barrier Reef faces increasing pressures.

Abbot Point would be the world's biggest coal port if approved for development in coming months.

The north Queensland coastal township closest to Abbot Point is about to get the chance to argue its case for and against the expansion.