PORT DOUGLAS, Australia (AP) -- The Olympic flame traveled under water -- on Australia's Great Barrier Reef -- for the first time Tuesday.

  Powered by a special chemical formula, the torch had a three-minute deep-sea adventure at Agincourt Reef off the resort town of Port Douglas, about 1,100 miles north of the state capital of Brisbane.

  A team of chemists and engineers for a pyrotechnics company, Pains Wessex Australia, took nine months perfecting the flare to ensure it was able to burn underwater for several minutes. It was powerful enough to light up the reef around it.

  Marine biologist Wendy Craig Duncan swam with the torch on the reef as part of the Olympic flame's longest journey in the history of the games.

  The torch is making a 100-day, 16,700-mile tour of Australia, culminating in its arrival at the Olympic stadium for the opening ceremony on Sept. 15 in Sydney.