Olympic Mudminnow (Novumbra hubbsi)
...a species of mudminnow (Umbridae) a group of fish closely related to pike and muskellunge. Olympic mudminnow are the sole species in the genus Novumbra and are endemic to the western lowlands of Washington, specifically the Chehalis River basin, Deschutes River basin, and parts of the Olympic Peninsula. Olympic mudminnow typically inhabit dark areas along the bottoms of rivers (typically with mudbeds and dense vegetation) and will feed on fish larvae, eggs, and a variety of small invertebrates. N. hubbsi are known for their remarkable tolerance for low oxygen levels with individuals occurring in areas with very low oxygen concentrations.
Classification
Animalia-Chordata-Actinopterygii-Esociformes-Umbridae-Novumbra-N. hubbsi
Image: Julie A. Tyson