Red Tide Closes Australian Beach A swimmer stops short of a red algae bloom at Sydney's Clovelly Beach, Nov. 27, 2012, which closed some beaches for swimming including Bondi Beach for a period of time. William West/AFP/Getty Images

Red Tide Closes Australian Beach Red algae closes a beaches in Sydney, Australia, Nov. 27, 2012. Newspix/Rex/Rex USA

Red Tide Closes Australian Beach From the safety of a poool, a girl looks at the red algal bloom in the water at Clovelly Beach in Sydney, Australia, Nov. 27, 2012. Newspix/Rex/Rex USA

Red Tide Closes Australian Beach A mother and her daughter check out the red algal bloom in the water at Clovelly Beach in Sydney, Australia, Nov. 27, 2012. Newspix/Rex/Rex USA

Red Tide Closes Australian Beach A swimmer swims in the safety of the swimming pool as a red algae bloom is shown behind, at Sydney's Clovelly Beach, Nov. 27, 2012. William West/AFP/Getty Images

Red Tide Closes Australian Beach A seagull stands in a red algae bloom at Sydney's Clovelly Beach, Nov. 27, 2012. William West/AFP/Getty Images

Red Tide Closes Australian Beach People inspect a red algae bloom at Sydney's Clovelly Beach Nov. 27, 2012, which closed some beaches for swimming including Bondi Beach for a period of time. William West/AFP/Getty Images

Red Tide Closes Australian Beach A boy walks pas a red algae bloom at Sydney's Clovelly Beach, Nov. 27, 2012. William West/AFP/Getty Images

Red Tide Closes Australian Beach People walk past a red algae bloom discoloring the water at Sydney's Clovelly Beach Nov. 27, 2012. William West/AFP/Getty Images