Smelt have a distinctly forked tail and a strong cucumber smell.

Damming water for urban use, hydro-electric power generation, irrigation, and other industrial and commercial uses.

New Zealand's first eel farm was established in 1971. Despite other farms opening in later years, no eel farms remained by the start of the 1980s.

Learn about different kinds of beachs and how they form, with diagrams and examples of each type.

Some commonly-asked questions about tornadoes in New Zealand.

View annual, seasonal and monthly summaries of temperature, rainfall and sunshine data from across New Zealand.

View data that show reported target catch and estimated bycatch.

Developing probabilistic scenarios of expected future regional climate changes.

Shellfish gathering and farming take place in marine and freshwater environments.

Rural, urban, and suburban wastewater treatment methods.

An estuary is a partially enclosed body of water formed where freshwater from the land meets and mixes with saltwater from the ocean.