It is the northern part of Shark Bay .
The Geographe Channel is an arm of the Indian Ocean between Bernier Island and Dorre Island ( to the west ) and the mainland of Western Australia ( to the east ) .
Geographe Channel is the northern part of Shark Bay .
The Geographe Channel is an arm of the Indian Ocean between Bernier Island and Dorre Island ( to the west ) and the mainland of Western Australia ( to the east ) .