The same people who campaigned for the Palaszczuk Government on the back of its promise to protect the Great Barrier Reef turned on the minority administration on Monday, in scenes reminiscent of the Newman years.

On Monday, protesters gathered outside Queensland's parliament to protest the approval of Adani coal mining projects in the Galilee basin and at Abbot Point.

Using recycled Labor candidate placards, painted over with protest messages and contact details for ministers, including Premier Annastacia Palaszczuk and Mines Minister Anthony Lynham, more than 150 people gathered outside Queensland Parliament House to express their sense of "betrayal".

With Ms Palaszczuk's name greeted with calls of "traitor", the group, which included Greenpeace and GetUp supporters, as well as those who had backed Labor, waved cutouts representing bleached coral, while a protester, dressed as a clownfish, made famous by the Pixar movie Finding Nemo 'died'.