Petria Ann Thomas OAM (born 25 August 1975) is an Australian swimmer and Olympic gold medallist. She was born in Lismore, New South Wales and grew up in the nearby town of Mullumbimby.
In 1993, at the age of 17, Thomas won a bronze medal in the 200m butterfly at the World Championships. She followed this with two gold medals, in the 100m butterfly and 4x100m freestyle in the 1994 Commonwealth Games in Victoria, Canada.
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