Max length : 18.0 cm TL male/unsexed; (Ref. 5723); common length : 12.5 cm TL male/unsexed; (Ref. 12193); max. reported age: 3 years (Ref. 12193)
Environment
Benthopelagic; freshwater
Climate / Range
Temperate; 60°N - 30°N
North America: St. Lawrence-Great Lakes, Hudson Bay and Mississippi River basins from Quebec to Saskatchewan in Canada south to Gulf of Mexico; and Atlantic and Gulf Slope drainages in the USA. Countries | FAO areas | Ecosystems | Occurrences | Introductions
Most common over gravel and sand in medium-sized rivers but can be found almost anywhere from small, fast-flowing rock-bottomed streams to vegetated lakes (Ref. 5723, 10294). Adults feed on larvae of midges, mayflies, caddisflies (especially hydropsychids), riffle beetles, stoneflies, limpets, and fish eggs (Ref. 10294). Eggs are found buried in the substrate (Ref. 7043).
