NBC News: Australia’s iconic Bondi Beach and Clovelly Beach were closed to swimmers on Tuesday as a red algae bloom drifted close to shore. Though the algae has no toxic effects, people are advised not to swim in areas with discolored water because the algae, which can be high in ammonia, can cause skin irritation.
Photo: A swimmer stops short of a red algae bloom at Sydney’s Clovelly Beach on Tuesday. Clovelly and Bondi Beaches were closed to swimmers as the bloom drifted closer to shore. (William West / AFP - Getty Images)