Adults occur in various habitats, but most common in rocky riffles and runs of clear mountain creeks and small to medium rivers. Rarely found in lakes . They feed on diatoms, other algae, higher plants, dipterous larvae and pupae . Spawning adults may be preyed upon by birds and mammals while small individuals may be preyed upon by stream salmonids . Edible.
: elongated.
Behavioural data for Mountain sucker is currently being reviewed.
Freshwater; demersal; potamodromous . Temperate; 54°N - 38°N North America: Canada and USA from Saskatchewan River system and Fraser River drainage south through upper Missouri and Colorado River drainages to Colorado and Utah; Lahontan basin in the USA; upper Sacramento River system in California and through Oregon and Washington to southern British Columbia.
diatoms, other algae, higher plants, dipterous larvae and pupae (Ref
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