An interactive guide to the sponges of New Zealand.

Mountainous areas are subject to heavy snowfalls, high winds, and low temperatures. Semi-permanent snow and ice fields exist at about 1000-1100 metres during winter.

Tuna or freshwater eels are a very significant, widely-valued, heavily-exploited, culturally iconic mahinga kai resource.

NIWA's seafood sector work comprises our fish, fisheries and aquaculture research and consultancy.

Tornadoes, like the one that hit Auckland's western suburbs today, are relatively rare events in New Zealand.

This identification guide covers the common crustose coralline algae found in central New Zealand.

Water clarity or turbidity is the cloudiness or haziness in a fluid caused by individual small particles (suspended solids).

Impacts of hydro-electric activities on water quality and mahinga kai.

The climate of Otago is perhaps the most diverse of any region in New Zealand.

The atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and thermosphere.

Tairua station