Moriarty Rocks are a group of two major granite rocks, and several smaller ones, with a combined area of 2.46 ha, in south-eastern Australia. They are part of Tasmania’s Passage Island Group, lying in eastern Bass Strait south of Cape Barren Island in the Furneaux Group. They are a nature reserve.
There is little vegetation on the rocks, due to them being frequently wave-washed. black-faced cormorants breed there, and they hold an important breeding colony of Australian fur seals, with up to about 1000 pups being born there annually.
Coordinates: 40°35′S 148°16′E / 40.583°S 148.267°E / -40.583; 148.267