These occur where the mouth of a main river channel connects to shallow lagoons.

Elongated basins of simple shape and several to ten metres depth.

Very shallow basins (several metres depth). They are often elongated and run parallel to the shore.

Formal identification keys are the scientifically accepted way to identify species. These will allow the identification of species which are unclear when using quick guides.

Compared to other countries, New Zealand has a sparse freshwater fish fauna of just over fifty species. But it is unique and comprises at least thirty-five native species of which thirty-one are found only in New Zealand.

  

Publications related to the Catchments to Estuaries programme

These are some recent publications related to the causes and effects of water quality degradation programme.

These are some publications related to the Environmental flows programme.