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

Ruppia Waituna Lagoon

Inigo Zabarte-Maeztu, NIWA

Scientific diver Aleki Taumoepeau emerges from Southland’s Waituna Lagoon, draped in the native aquatic plant ruppia. Ruppia is a key ecosystem indicator and NIWA surveys the lagoon annually.