The park is home to several unique invertebrate species, and almost half of New Zealand’s indigenous fish species are found in or near the park.

Nationally threatened fish species include the giant kokopu, short-jawed kokopu, banded kokopu and koaro.

Powelliphanta land snails are among the largest snails in the world, growing up to 90mm across with colourful yellow, brown and black patterned shells. They are carnivorous, sucking up earthworms like spaghetti but are one of our most threatened invertebrates as they are very vulnerable to possums, rats, pigs, hedgehogs and thrushes.

Two native bat species are also thought to be resident in the park. They were first detected with recorders as recently as the summer of 2014/15.   Taranaki Mounga plans to complete a baseline survey on bat distribution and abundance to understand better how we can help their survival. This work will in turn help the bat-pollinated rare parasitic plant Dactylanthus..