HomeFish encyclopediaRay-finned fishesSmeltsGalaxiidsBlack mudfish Black mudfish (Neochanna diversus) Scientific name: Neochanna diversus Stokell, 1949 The Black mudfish (Neochanna diversus) is a freshwater fish of the family Galaxiidae. Native range: Oceania, endemic to New Zealand. BiologyInhabit ephemeral areas that dry out over summer and autumn months, where they aestivate in damp areas or under tree roots and logs.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameNeochanna diversusFamilyGalaxiidae (Galaxiids)OrderOsmeriformes (Smelts)ClassActinopterygii (Ray-finned fishes)Maximum length12.2EnvironmentFreshwater; demersal; non-migratoryClimateSubtropicalDistributionOceania: endemic to New Zealand.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessUsesFisheries: of no interestResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Fec=940) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026