Australia will spend 1.3 billion Australian dollars ($965.3 million) in the next five years to improve the water quality and wellbeing of the Great Barrier Reef to prevent the World Heritage Site being placed on the United Nation's "in danger" list.

But activists say the money — in addition to the A$1 billion fund announced earlier — is insufficient and want the government to take more concrete action to protect the reef.

A negative rating for the Great Barrier Reef — located off the country's northeast coast — would be embarrassing for the Australian government and damage its lucrative tourism industry.