Information about past climate is obtained from piecing evidence together from various sources.

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

Temperature affects the number and type of animals and plants that live in a waterway.

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

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

Dissolved oxygen (DO) is a relative measure of the amount of oxygen (O2) dissolved in water.

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

Longfin eels are the largest and longest-lived fish in New Zealand's freshwaters, and where they are present they are the top predator.