Open water swimming at the 2023 World Aquatics Championships – Mixed 4 × 1500 metre relay

Each athlete swam 1500 m. The teams consisted of two men and two women, meaning each team completed 6 km in total. The men and women could swim in any order. == Qualification ==

Each World Aquatics member federation could enter one team. == Background ==

Germany was the favourite going into the event, with Leonie Beck having won the women's 5 km and 10 km earlier in the programme. Germany's Florian Wellbrock, who won the individual men's 5 km and 10 km, did not compete in this event, in order to recover for the 1500 m and 800 m races in the pool. ==Race==

The race took place at 08:00 on 20 July at the Seaside Momochi Beach Park in Fukuoka, Japan. The water temperature was around and the air temperature was about . By the 3700-metre mark (700 metres into the third leg), Australia was leading the race with Nicholas Sloman, who was sixteen seconds ahead of Germany's Rob Muffels. Australia's Kyle Lee entered the water at the final changeover with a lead of seven seconds on Italy's Gregorio Paltrinieri and Hungary's Dávid Betlehem. Lee was overtaken by Paltrinieri and Betlehem, and Paltrinieri and Betlehem continued to race to the finish. Paltrinieri won for Italy with a time of 1:10:31.2, while Hungary finished second with 1:10:35.3. Australia finished third with 1:11.26.9, two tenths of a second ahead of Germany in fourth. A photo finish was needed to determine whether Australia or Germany won the bronze. It was the first time Italy had won an open water team event at the World Championships. == Notes ==

• – Graph comparing the placement of each team throughout the race • – Photo gallery from the event • – Another photo gallery from the event • – Post-race quotes from the swimmers in the medalling teams • – Post-race quotes from the United States swimmers • – Includes the French Swimming Federation's report on the race and two post-race quotes from the French swimmers. • – Report on the German performance • – Further details on the Italian race and post-race quotes from the Italian team ==References==