Iowa DNR
River & Stream Biological Monitoring
Fish and Benthic Macroinvertebrate Surveys
Physical Habitat Assessments

Ozark Minnow Notropis nubilus

Cyprinidae (Minnows)
Trophic Class
Is Exotic to Iowa?
Is Lithophilous Spawner?
Is Hybrid?
State Listing Status
Not Listed
Assessment Program Statistics

This species was found at 29 bioassessment sites, 1 rapid fish bioassessment site, 16 fisheries assessment sites, and 0 fisheries presence-only assessment sites. In total, it was collected at 44 distinct sites, or 3.3% of the 1350 total sites monitored by the bioassessment program. It is the 70th most commonly collected species.

The Ozark Minnow was collected in 74 bioassessment sampling sessions and 87 fisheries assessment sessions. It was present in 1 rapid bioassessment session and 0 presence-only sessions.

The biological assessment program has collected a total of 6,292 individual Ozark Minnow specimens, ranking it the #36 most collected fish.

Species Characteristics

The body is dusky above with dull, silvery sides and silvery-white belly. A dark lateral band starts on the tip of the snout and ends in a faint spot at the end of the caudal peduncle. The terminal mouth is slightly oblique and has no barbel. Prominent eyes look large in proportion to the head. The complete lateral line has 36 to 38 scales. Dorsal, anal, and pelvic fins have 8 rays, while the pectoral fins vary from 13 to 15 rays. Short, hooked pharyngeal teeth are arranged in a 4-4 formula. The long intestine is coiled, unlike most species, and the peritoneum is black.

Species Distribution Maps

HUC12 watersheds where this species has been found