Help stop the spread of the freshwater gold clam in Tai Tokerau

Following the 2026 Waka National Sprints, a compulsory ten-day rāhui has been placed on all waka paddling in Tai Tokerau lakes to prevent the spread of the invasive freshwater golden clam. This temporary ban on lake access is a critical biosecurity response, recognising that waka, equipment, and water contact can unintentionally transfer microscopic clam larvae between waterways. DNA testing has taken place within most lakes within the Far North over the last 6 months to ensure that these lakes remain free of the invasive freshwater gold clam species and that the continued efforts of iwi, hapū, whānau, government and community groups continue on into the future.

The rāhui reflects collective responsibility to protect freshwater ecosystems, taonga species, and future generations. By pausing paddling activity, communities, athletes, and clubs play an active role in halting the spread of this pest and upholding kaitiakitanga over Tai Tokerau’s lakes.

The freshwater gold clam (Corbicula fluminea) is a small shellfish that reproduces rapidly. It can clog water pipes and possibly overrun native species. First found in the Waikato River in May 2023, it is an unwanted organism under the Biosecurity Act.

Alongside the 10-day 'no paddling' rāhui, here are two things you can also do to help stop it spreading.

1. Report any sightings!

2. People using rivers and lakes can spread this clam and other invasive species when they shift watercraft and gear. To prevent this, when you move: