Brisbane residents are campaigning against the Redlands Toondah Harbour development over concerns it will damage koala habitats and protected wetlands.
The development is listed as a priority development area (PDA), which plans for three thousand six hundred apartments to be built over the water.
The PDA status means developers are not required to comply with environmental regulations.
Koala Action Group President Debbie Pointing said the development will be a death sentence for local shorebirds and koalas.
"[The koalas] cross the only two roads into the development area, and with such a significant increase in traffic from up to 10,000 people who will call this small area home if it's approved, there's not a chance that they can move across this landscape as they have been doing," said Debbie Pointing.