The nationally endangered Macquarie Perch (Macquaria australasica) was formerly present in a number of streams in the Canberra region including the Murrumbidgee, Cotter, Paddys, Molonglo, Queanbeyan, Goodradigbee and Paddys rivers. Monitoring of the Murrumbidgee population in the ACT demonstrated significant declines occurred in the mid-1980s. The Queanbeyan River population declined following the construction of Googong Reservoir in 1978. Information on the Paddys River population is more sketchy, but had declined to negligible levels by the late 1980s. The Goodradigbee population declined somewhere between the mid 1980s and the mid 1990s, and is now below detectable levels, and the Cotter River population is thriving over a very restricted geographic range. Translocations in the Queanbeyan and Cotter catchments in the 1980s met with mixed success, and the only viable ACT population of the species now exists only in the lower Cotter River, where a large new impoundment is planned. Viable populations also exist in the upper Murrumbidgee River above Cooma. A new program to establish additional populations around the ACT commenced in 2006, and will be outlined in this presentation.