Phoenix Synchronised Swimming Club girls from Southland at the Synchronised Swimming National Championships opening ceremony at Splash Palace.

More than 150 competitors, including swimmers from China, New Caledonia and nine clubs from around New Zealand are in Invercargill for the New Zealand Synchronised Swimming Championships, which started on Tuesday and finishes on Thursday.

There is plenty of local interest in southern clubs Phoenix and Alpine Synchro, while the New Zealand Development Team featuring Southlanders Abbey Flutey, Ali Robertson, Arielle Wilkes and Isabella Gillanders will also be participating at Splash Palace.

The NZ Development Team will be using the competition as a platform to showcase their routine before heading to the Singapore Opens in November, while Wilkes and Flutey are also continuing on to compete at the Asia Pacific Open in Kuala Lumpur.

Kavinda Herath/Stuff Phoenix Synchro in action at the New Zealand Synchronised Swimming National Championships in Invercargill.

These swimmers will also be competing for their club teams in solo, duet and team divisions in their respective age groups and competition is expected to be fierce.

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One pair to watch is the New Zealand Open duet consisting of Jazzlee Thomas and Eva Morris from Tauranga, who have competed at both the World Junior Championships and the World Open Championships.

More than 50 officials are also in attendance, including MBE winning Jennifer Gray and New Zealand's only FINA A grade Judge Joanne Burns.

The age group and national teams will be competing at 3:45pm on Wednesday.