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

Blackstripe Topminnow Fundulus notatus

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

This species was found at 25 bioassessment sites, 0 rapid fish bioassessment sites, 1 fisheries assessment site, and 0 fisheries presence-only assessment sites. In total, it was collected at 26 distinct sites, or 1.8% of the 1473 total sites monitored by the bioassessment program. It is the 83rd most commonly collected species.

The Blackstripe Topminnow was collected in 62 bioassessment sampling sessions and 1 fisheries assessment session. It was present in 0 rapid bioassessment sessions and 0 presence-only sessions.

The biological assessment program has collected a total of 1,374 individual Blackstripe Topminnow specimens, ranking it the #61 most collected fish.

Species Characteristics

A slender-bodied, almost cylindrical topminnow; the top of its head and nape are flattened. The snout is pointed, and the mouth is small, oblique and opens dorsally. It has a projecting lower jaw with very small teeth in bands on both jaws. The dorsal fin is far posterior on the back and is inserted into the body behind the origin of the anal fin and has 8 to 10 rays. The anal fin has 12 rays, pelvic fin 6 rays, and the caudal fin is rounded. The lateral line is incomplete with 31 to 36 large, cycloid scales in a lateral series. Its back and upper sides are olive and white below. The sides have a dark stripe, nearly straight edged in females and with crossbars in males. Adults average 1.5- to 2.5-inches long with a maximum of just over 3 inches. Males grow larger than females.

Species Distribution Maps

HUC12 watersheds where this species has been found