Olympic mudminnow (Novumbra hubbsi)

Scientific name: Novumbra hubbsi Schultz, 1929

The Olympic mudminnow (Novumbra hubbsi) is a freshwater fish of the family Umbridae. In the aquarium it needs water at 4–25°C (39–77°F).

Olympic mudminnow care at a glance

Occurs in quiet water with dense vegetation or other cover over mud and debris; also in cool, brown waters of bogs and swamps.

Source: FishBase, licensed CC BY-NC 4.0.

Scientific name: Novumbra hubbsi
Family: Umbridae (Mudminnows)
Order: Esociformes (Pikes and Mudminnows)
Class: Actinopterygii (Ray-finned fishes)
Maximum length: 8.0
Common length: 5.5
Environment: Freshwater; demersal
Climate: Temperate
Distribution: North America: coastal lowlands of Olympic Peninsula in Washington, USA from Ozette Lake and Queets River drainage to upper Chehalis River drainage; occasionally in lower Deschutes River, as a result of floodwater exchange with Chehalis River.
Conservation status (IUCN): Lower Risk: near threatened (LR/nt)
Threat to humans: Harmless
Resilience: High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)

Taxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.

Last updated 27 September 2026