| Family: |
Leuciscidae (Minnows), subfamily: Laviniinae |
| Max. size: |
38 cm TL (male/unsexed) |
| Environment: |
benthopelagic; freshwater, potamodromous |
| Distribution: |
North America: upper Colorado River drainage in Wyoming, Colorado, Utah and Arizona, USA. |
| Diagnosis: |
Body deep and compressed; caudal peduncle long, extremely slender; fins falcate; caudal fin large, forked; angle along anal fin base continues along upper edge of caudal fin. Large-sized individuals possess large, nearly scaleless hump behind small, depressed head; mouth subterminal, extending to front of small eye; 73-90 scales on lateral line; usually 9 dorsal rays; 10 anal rays; pharyngeal teeth 2,5-4.2. Dark olive-gray above, silver side (Ref. 86798). |
| Biology: |
Inhabits swift, rocky runs and flowing pools. The hump at the back of the head directs fish to maintain position in the swift water (Ref. 86798). |
| IUCN Red List Status: |
Endangered (EN); Date assessed: 10 February 2012 (B2ab(v)) Ref. (130435)
|
| Threat to humans: |
harmless |
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