Australia's swim team saved its best for last on the first night in the pool at the Commonwealth Games.
Sisters Bronte and Cate Campbell, Emma McKeon and Shayna Jack clocked a time of 3 minutes, 30.05 seconds to break the world record in the 4x100-meter women's freestyle relay.
The Aussies -- including the Campbells and McKeon -- set a world record with a 3:30.65 time at the Rio de Janeiro Olympics in 2016.
Canada finished second, nearly four seconds behind. England took the bronze, more than eight seconds behind Australia.
Cate Campbell said the 10,000-strong home crowd at the Gold Coast Aquatic Centre was "beyond my wildest dreams."
My coach said, 'The atmosphere out there is electric, go out, soak it up,'" she said. "I think that is what we have done.''
The Australians haven't lost the event at a Commonwealth Games since 1994, at Victoria, Canada.
Earlier, Olympic champion Mack Horton won the 400-meter freestyle and was joined by Canada's Taylor Ruck and Aimee Willmott and James Wilby of England as gold-medal winners in the four individual events.