Kyle Chalmers says his relocation from South Australia to Queensland under a new swim coach has had a positive impact ahead of his third Olympic campaign.

Mollie O'Callaghan has staved off Olympic champion Ariarne Titmus's mid-race challenge to post the fastest women's 200m freestyle time of the year.

Ariarne Titmus and Cam McEvoy have delivered fine swims to win titles at the Australian championships on the Gold Coast.

Kaylee McKeown says Stephanie Rice remains a legend of the sport despite surpassing her Australian records in the 200m and 400m individual medleys.

Mollie O'Callaghan has opened her Australian championship campaign with victory in the 100m freestyle, while Kaylee McKeown has broken the 200m IM record.

Australian swimmer James Magnussen says there's no room for error in his drug-taking program designed to make him the fastest swimmer ever.

Cameron McEvoy has been pipped by just 0.01sec in his bid to retain his 50m free title on a day of three silvers for the Dolphins at the world championships.

Shayna Jack has won the 100m freestyle bronze at the world championships while Cameron McEvoy looks on course to power to gold in Doha's 50m free dash.

Soaring Australian teenage backstroker Iona Anderson has won her second silver medal of the world championships in the 50m backstroke.

Sam Williamson has won Australia's first swimming gold of the world championships in the 50m breaststroke, as the Dolphins enjoyed a four-medal night in Doha.

Elijah Winnington came up short in his bid to regain his world 400m freestyle title while a shadow women's 4x100m free relay team had to settle for silver too.

Australian Cassiel Rousseau says it was an unexpected surprise to be named the 2023 World Aquatics Diving Athlete of the Year.

Retired Australian swimmer James Magnussen is the first person to publicly pledge to compete at an Olympic-styled event for drug-taking athletes.

Swimmer Kyle Lee has earned a last-gasp gold for Australia in the open water relay at the world championships - a day after sitting an accountancy exam.

Australia have won their second gold medal of the aquatic world championships in Doha after taking out the 4x1500m mixed open-water race.

Australia's Chelsea Gubecka has won a world championship open water 5km silver - and believes she's getting better as she dreams of Olympic gold in the Seine.

Swimming Australia has named dual Olympian Rob Woodhouse, an uncle of Emma McKeon, as its new chief executive.

Australia will have a full complement of open water swimmers at the Olympics after Nick Sloman finished fifth in the world championships 10km slog in Doha.

Moesha Johnson reckoned she felt bashed up as she just missed out on a world championship medal in the 10km open water event

Olympic gold medallist Mack Horton has announced his retirement from competitive swimming at age 27 after a long and decorated career.