Their gold rush at the Melbourne Sports and Aquatic Centre started in the men's 50 metres butterfly and featured an all-Australian final podium.

Josh Alford took the gold medal in 27.75secs, with Nick Layton finishing in 25.98 but receiving the silver medal due to the classification system. 

Harrison Vig secured the bronze medal in 29.03.

Timothy Hodge then won Australia's second of the day, winning the men's 50m backstroke in 30.27. 

His compatriots Rod Welsh and Alford came second and third in 29.23 and 31.48 respectively. 

The men's 200 individual medley final saw Hodge pick up his second gold of the day and Australia's third. 

Fellow Australian Liam Schluter took the silver medal with a time of 2:14.70, while Hong Kong's Long Tin Chan received bronze for a time of 2:19.88.

"It’s been great racing here," 18-year-old Hodge said.

"I’ve never actually raced in this outdoor pool before, it’s been a good experience.

"I’ll start preparing for the next Paralympics. 

Hodge added: "I’ll be working on the small stuff like skills, to try and perfect my individual race leading up to Tokyo. 

"Hopefully I’ll be fit and ready to go."

Australia completed its medal haul through Schluter, winner of penultimate race of the night, the men’s 200m freestyle.

He recorded a time of 1:56.29, faster than Hong Kong's Tang Wai Lok in 1:59.77 and Australia's Jack Ireland in 2:00.44.

It left Australia topping the medal table with nine golds, 15 silvers and 16 bronze, having won 40 of the 66 medals on offer. 

New Zealand finished second in the medal table with six golds and two silvers. 

Sophie Pascoe of New Zealand set her second S9 world record of the competition when she won the women’s 50m butterfly final.

Her time of 28.15 surpassed the previous record of 30.96 set by Spain's Sarai Gascon in 2017.

Australia's Emily Beecroft was second in that race with 31.28, and her compatriot Taylor Corry was third in 31.14.

The next event in the series is due to take place in Indianapolis from April 4  to 6.