Fundulus notatus

The blackstripe topminnow, Fundulus notatus, is small freshwater fish in the family Fundulidae, found in central North America. The blackstripe topminnow is found in Canada along a roughly 60 kilometre stretch of Ontario's Sydenham River. In the United States, it occupies other parts of the southern drainage of lakes Erie and Michigan and also the Mississippi drainage basin between Illinois and the Gulf of Mexico. The entire Canadian population of this small freshwater fish lives along a roughly 60 kilometre stretch of the Sydenham River in southwestern Ontario. Discovered only in 1972, the blackstripe topminnow is a fairly hardy fish although its greatest threats come from changes to its habitat due to human activity.