Black mudfish

Black mudfish
N. diversus in Waikato, New Zealand
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Galaxiiformes
Family: Galaxiidae
Genus: Neochanna
Species:
N. diversus
Binomial name
Neochanna diversus
Stokell, 1949
Approximate known distribution of the black mudfish on a map of the North Island

The waikaka or black mudfish (Neochanna diversus) is a fish of the family Galaxiidae, found only in swamps and wetlands in the northern half of the North Island of New Zealand, from Kaitaia in the north to the Mōkau River in the south.