The grey nurse shark is a migratory species that is known to move north and south between particular sites along the east coast of Australia. When not migrating, these sharks aggregate in or near deep sandy-bottomed gutters or in rocky caves around inshore rocky reefs and islands at depths between 15 and 40 metres (Otway and Parker 2000). Depending on the time of year, both mature and juvenile grey nurse sharks may be found at aggregation sites in southern Queensland and New South Wales. The results of diver surveys concluded that grey nurse sharks were no longer found at many of the sites that they were known to previously use.
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