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Which confirmed water bodies have been detected with invasive gold clam (Corbicula fluminea) incursions in New Zealand, including approximate location, date of detection, and method of detection, by list?

Answered Question 2980 (2026)
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Asked by

Jo Luxton

List MP · Labour Party

Question

  • Which confirmed water bodies have been detected with invasive gold clam (Corbicula fluminea) incursions in New Zealand, including approximate location, date of detection, and method of detection, by list?

Answered by

Hon Andrew Hoggard

List MP · ACT Party · Minister for Biosecurity

Answer

I am advised that Corbicula fluminea was first detected at Bob’s Landing in the Waikato River near Lake Karāpiro in May 2023, and is now found from Lake Maraetai to Tuakau. It was found in Lake Rotomanu, a small man-made lake in Taranaki, in November 2025. In these instances, the detections were made visually.