Distinguished by the lack of distinct black spots on the back and tail and by the presence of 18 to 28 short, stout, smooth gill rakers on the first arch (Ref. 27547). Pelvic fins with axillary process; caudal truncate to slightly emarginate (Ref. 27547). Large individuals are steel-blue dorsally, with speckles of black; silver on the sides; silvery to white ventrally. Males have tinges of black on the tips of its caudal, anal and pectoral fins. Spawning males are dark olive to black dorsally; grey-red with green vertical bars on the sides; dark grey ventrally; anal and pelvic fins with white tips. Spawning females resemble spawning males but less distinctly marked.
- Scott, W.B. and E.J. Crossman 1973 Freshwater fishes of Canada. Bull. Fish. Res. Board Can. 184:1-966. (Ref. 1998) http://www.fishbase.org/references/FBRefSummary.php?id=1998&speccode=2594
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