On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.

Elvers and juvenile eels in a trap and transfer facility at Karapiro Dam

With the help of organisations such as the Eel Enhancement Company, Mighty River Power and NIWA, every year millions of elvers are transferred from the base of Karāpiro Dam to lakes and tributaries upstream. Credit: NIWA