Dangerous Reef

Dangerous Reef is a small reef and island system in Spencer Gulf, South Australia, about 32.5 kilometers east-southeast of Port Lincoln, and the southernmost member of the Sir Joseph Banks Group. It consists of a chain of eroded granite or granite-gneiss rocks forming an isolated inselberg ridge dating to the Kimban Orogeny of roughly 1,600 to 1,800 million years ago, with a navigation light in place since 1911. The reef hosts a breeding colony of Australian sea lions and is known for the great white sharks that gather in its waters, making it a noted site for shark cage diving and a filming location for Blue Water, White Death and Jaws. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/