| Species | Name | Family | Habitat | Length (cm) | Trophic Level | Status |
|---|---|---|---|---|---|---|
| Acipenser transmontanus | White sturgeon | Acipenseridae | demersal | 610.0 TL | 3.3 | native |
| Acrocheilus alutaceus | Chiselmouth | Leuciscidae | demersal | 30.0 TL | 2.1 | native |
| Ameiurus nebulosus | Brown bullhead | Ictaluridae | demersal | 55.0 TL | 3.7 | introduced |
| Catostomus ardens | Utah sucker | Catostomidae | demersal | 65.0 TL | 2.8 | native |
| Catostomus bondi | Catostomidae | benthopelagic | 12.9 SL | 2.9 | native | |
| Catostomus catostomus | Longnose sucker | Catostomidae | demersal | 64.0 TL | 2.5 | native |
| Catostomus columbianus | Bridgelip sucker | Catostomidae | demersal | 30.0 TL | 2.8 | native |
| Catostomus discobolus | Bluehead sucker | Catostomidae | demersal | 41.0 TL | 2.8 | native |
| Catostomus macrocheilus | Largescale sucker | Catostomidae | demersal | 61.0 TL | 3.1 | native |
| Cottus bairdii | Mottled sculpin | Cottidae | demersal | 15.0 TL | 3.3 | misidentification |
| Cottus beldingii | Paiute sculpin | Cottidae | demersal | 13.0 TL | 3.3 | native |
| Cottus cognatus | Slimy sculpin | Cottidae | demersal | 12.1 TL | 3.4 | native |
| Cottus confusus | Shorthead sculpin | Cottidae | demersal | 15.0 TL | 3.7 | native |
| Cottus gulosus | Riffle sculpin | Cottidae | demersal | 11.0 TL | 3.3 | native |
| Cottus hubbsi | Cottidae | demersal | 11.2 SL | 3.3 | endemic | |
| Cottus marginatus | Margined sculpin | Cottidae | demersal | 13.0 TL | 3.3 | native |
| Cottus rhotheus | Torrent sculpin | Cottidae | demersal | 15.5 TL | 3.4 | native |
| Cottus schitsuumsh | Cottidae | benthopelagic | 9.9 SL | 3.3 | native | |
| Couesius plumbeus | Lake chub | Leuciscidae | demersal | 23.0 TL | 3.4 | native |
| Entosphenus tridentatus | Pacific lamprey | Petromyzontidae | demersal | 76.0 TL | 4.5 | native |
| Lampetra pacifica | Pacific brook lamprey | Petromyzontidae | demersal | 17.5 TL | 3.7 | endemic |
| Lampetra richardsoni | Western brook lamprey | Petromyzontidae | demersal | 17.3 TL | 2.4 | native |
| Lepomis macrochirus | Bluegill | Centrarchidae | benthopelagic | 41.0 TL | 3.2 | introduced |
| Mylocheilus caurinus | Peamouth | Leuciscidae | demersal | 36.0 TL | 3.5 | native |
| Oncorhynchus nerka | Sockeye salmon | Salmonidae | pelagic-oceanic | 84.0 TL | 3.5 | native |
| Percopsis transmontana | Sand roller | Percopsidae | demersal | 9.6 TL | 3.3 | endemic |
| Prosopium coulterii | Pygmy whitefish | Salmonidae | benthopelagic | 28.0 TL | 3.1 | native |
| Ptychocheilus oregonensis | Northern pikeminnow | Leuciscidae | benthopelagic | 63.0 TL | 4.2 | native |
| Rhinichthys falcatus | Leopard dace | Leuciscidae | demersal | 12.0 TL | 2.7 | native |
| Rhinichthys osculus | Speckled dace | Leuciscidae | demersal | 11.0 TL | 2.9 | native |
| Rhinichthys umatilla | Umatilla dace | Leuciscidae | demersal | 12.0 TL | 2.9 | native |
| Rhinogobius brunneus | Amur goby | Gobiidae | demersal | 5.8 TL | 3.7 | introduced |
| Richardsonius balteatus | Redside shiner | Leuciscidae | demersal | 18.0 TL | 3.4 | native |
| Salvelinus confluentus | Bull trout | Salmonidae | benthopelagic | 103.0 TL | 3.7 | native |
| Siphateles bicolor | Tui chub | Leuciscidae | benthopelagic | 45.0 TL | 2.0 | native |