| Family | Scientific Name | Author | Year | Common Name |
| Leuciscidae | Rhinichthys obtusus | Agassiz | 1854 | Western Blacknose Dace |
Rhinichthys obtusus
Unique Characters: Long, slender streamlined body, flattened below. Small scales. Many brown-black specks on back and side. Barbel in corner of mouth. No groove separating snout from upper lip. Breeding male has reddish-orange below a black lateral stripe.
Similar Species:
Eastern Blacknose Dace
Rhinichthys atratulus
Longnose Dace
Rhinichthys cataractae
Eastern Blacknose Dace Rhinichthys atratulus. Breeding male has gold yellow below red-black stripe.
Longnose Dace Rhinichthys cataractae. Long, slender streamlined body, flattened below. Very small scales. Many brown-black specks on back and side. Barbel in corner of mouth. No groove separating snout from upper lip. Long fleshy snout. Eyes high on the head.
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