The Largescale Sucker

Western Range

The distribution includes Canadian Arctic-draining waters and Pacific-slope systems from British Columbia into the interior northwestern United States. The species is Catostomus macrocheilus. Its range should not be merged with that of the separately named Klamath Largescale Sucker.

Feeding Across Growth

Young fish take small planktonic crustaceans and insect larvae. Adults consume algae, diatoms, insects, amphipods and mollusks, with salmonid eggs also reported. The mixture reflects both plant material and animal prey rather than an exclusively algae-eating life history.

Habitat and Length

Adults use pools and runs of medium to large rivers and also occur in lakes. The compiled maximum is 61 centimeters total length. Retaining the waterbody and life stage helps explain differences between a small young fish near the margin and a larger bottom-feeding adult.

All Lakes With Largescale Sucker

Browse lakes and reservoirs with documented Largescale Sucker records, listed alphabetically. Records do not establish current abundance or public access. Check the evidence and managing authority for the water you choose.

Showing 1–24 of 550 lakes · Page 1 of 23

• Aberdeen Reservoir Grays Harbor, WA
• Aeration Lagoon Pierce, WA
• Alaska Street Reservoir Pierce, WA
• Alder Lake Pierce, WA
• Alkali Lake Grant, WA
• Alturas Lake Blaine, ID
• Amc Settling Pond #2 Deer Lodge, MT
• AMC Settling Pond #3 Deer Lodge, MT
• American Lake Pierce, WA
• Anderson Lake Kootenai, ID
• Anderson Lake Jefferson, WA
• Anderson Pond Pierce, WA
• Angle Lake King, WA
• Armstrong Lake Lincoln, WA
• Ashes Lake Skamania, WA
• Ayer Reservoir San Juan, WA
• Baker Reservoir Whatcom, WA
• Banana Lake Lincoln, MT
• Banks Lake Grant, WA
• Barrett Lake Whatcom, WA
• Bass Lake King, WA
• Battle Ground Lake Clark, WA
• Bay Lake Pierce, WA
• Beacon Hill North Reservoir King, WA