Rising Tide environmental activists blocked coal exports at Newcastle on Sunday.
Close to 600 protestors blocked the harbour by paddling kayaks and canoes in to the shipping lanes.
According to Rising Tide, the blockade was to protest climate change and the export of coal.
One paddler was arrested but later released without charge.
This most recent action comes after these activists were taken to court by Port Waratah Coal Services (PWCS) after they broke into PWCS facilities and chained themselves to machinery.
Port Waratah lost the case but did highlight the unsafe actions of activists at the protest.
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