Inhabit rocky riffles of small to large rivers . Adults usually occur in deep swift riffles while young in shallow riffles and runs .
Physical description for River darter is currently being compiled.
Behavioural data for River darter is currently being reviewed.
Freshwater; benthopelagic. Temperate; 58°N - 29°N North America: Hudson Bay basin in Ontario and Manitoba in Canada, and North Dakota south in Great Lakes and Mississippi River basins to Louisiana in the USA; Gulf drainages from Mobile Bay in Alabama to Neches River in Texas, USA; isolated population in San Antonio Bay drainage in Texas.
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