Freshwater fish

The largest member of the Galaxiidae family.

Inanga are the predominant species in the modern whitebait fishery.

Grey mullet have a worldwide distribution and Aotearoa is at the southern limit of their range.

Kōaro are excellent climbers and like clear, swiftly flowing, forested streams.

Our biosecurity management tools include: assessment models, field surveys, management advice and the testing of control methods.

This is a user guide on non-native fish, reptile, invertebrate, algal and plant species that are recorded in New Zealand freshwaters.

Identifying the factors causing fish numbers to drop will allow you to determine which restoration tools you need to employ.

The giant kōkopu is a native whitebait species considered rare and vulnerable. NIWA is working with Mahurangi Technical Institute and environmental consultancy Boffa Miskell to test the feasibility of reintroducing giant kōkopu to Nukumea Stream, north of Auckland.

The kōaro was once abundant in the Te Arawa lakes near Rotorua in New Zealand’s North Island. NIWA has assessed the viability of restoring this species in the region.

Giant kokopu

Common bully

Torrentfish