The Waikato River Authority was proud to once again support the 2025 World Koi Carp Classic – an event that plays a vital role in improving the health of the Waikato River by reducing pest fish numbers.
The 35th annual competition event drew 62 entries, including international competitor Chris Cass from the United States and participants from Wellington, Carterton, Stratford, and Dargaville.
In total, competitors removed 2,597 koi carp weighing a combined 4.7 tonnes, the best result in a decade. Despite the highest lake and river levels in the event’s history, fine weather and adaptable anglers made for a successful tournament.
The standout catch of the weekend was a 22.8-kilogram grass carp landed by Andrew Cottle, the heaviest recorded since 2008. The fish secured Cottle the Heaviest Other Fish prize.
The prestigious Waikato River Authority Trophy for Heaviest Koi Carp was shared between Bradley Aberhart and Angus McMillan, who each weighed in 6-kilogram koi carp on Saturday.
Event organisers Dawn and Allan Metcalfe said the strong turnout and results showed the continued enthusiasm for controlling pest fish in the Waikato catchment.
“Every koi carp removed helps improve the health of our waterways,” he said.
“We’re grateful to our partners, particularly the Waikato River Authority, whose ongoing support makes this work possible.”


