Cooper

Cass County, Minnesota — DOW #11016300

34 Surveys
132.53
Acres
70 ft
Max Depth
0
12
Fish Species
25
Local Guides

DNR Fish Surveys

Catch-per-unit-effort (CPUE) data from Minnesota DNR fish population assessments on Cooper. Green = above normal range. Red = below normal.

Yellow Perch

Date Gear CPUE Normal Range Avg Weight Total Catch
1987-07-06 Standard trap nets 1.7 (above normal) 0.3 – 1.2 0.16 lb 5
1987-07-06 Standard gill nets 8.3 (normal) 1.0 – 10.3 0.12 lb 25
1973-07-09 Standard trap nets 2.3 (above normal) 0.3 – 1.2 0.14 lb 18
1973-07-09 Standard gill nets 7.3 (normal) 1.0 – 10.3 0.11 lb 22

Yellow Bullhead

Date Gear CPUE Normal Range Avg Weight Total Catch
1987-07-06 Standard gill nets 1.0 (below normal) 2.1 – 15.8 0.43 lb 3
1987-07-06 Standard trap nets 0.3 (below normal) 2.7 – 13.5 0.30 lb 1
1973-07-09 Standard trap nets 3.0 (normal) 2.7 – 13.5 0.67 lb 24

Northern Pike

Date Gear CPUE Normal Range Avg Weight Total Catch
1987-07-06 Standard gill nets 5.3 (normal) 3.5 – 8.9 3.16 lb 16
1973-07-09 Standard gill nets 2.3 (below normal) 3.5 – 8.9 3.33 lb 7
1973-07-09 Standard trap nets 0.3 3.85 lb 2

Rock Bass

Date Gear CPUE Normal Range Avg Weight Total Catch
1987-07-06 Standard gill nets 3.0 (above normal) 0.5 – 1.7 0.29 lb 9
1987-07-06 Standard trap nets 2.0 (above normal) 0.4 – 1.7 0.22 lb 6
1973-07-09 Standard trap nets 7.5 (above normal) 0.4 – 1.7 0.20 lb 60

Walleye

Date Gear CPUE Normal Range Avg Weight Total Catch
1987-07-06 Standard gill nets 0.3 (below normal) 0.5 – 2.3 7.00 lb 1

Hybrid Sunfish

Date Gear CPUE Normal Range Avg Weight Total Catch
1987-07-06 Standard trap nets 1.0 0.37 lb 3

Largemouth Bass

Date Gear CPUE Normal Range Avg Weight Total Catch
1987-07-06 Standard gill nets 1.3 (normal) 0.4 – 1.6 0.93 lb 4
1987-07-06 Standard trap nets 1.0 (normal) 0.3 – 1.4 0.83 lb 3
1973-07-09 Standard trap nets 1.6 (above normal) 0.3 – 1.4 0.15 lb 13
1973-07-09 Standard gill nets 0.3 (below normal) 0.4 – 1.6 0.20 lb 1

Bluegill

Date Gear CPUE Normal Range Avg Weight Total Catch
1987-07-06 Standard gill nets 12.7 0.09 lb 38
1987-07-06 Standard trap nets 40.0 (normal) 9.5 – 57.3 0.14 lb 120
1973-07-09 Standard trap nets 70.4 (above normal) 9.5 – 57.3 0.13 lb 563

Pumpkinseed

Date Gear CPUE Normal Range Avg Weight Total Catch
1987-07-06 Standard gill nets 10.0 0.15 lb 30
1987-07-06 Standard trap nets 10.7 (above normal) 1.5 – 6.8 0.15 lb 32
1973-07-09 Standard trap nets 36.3 (above normal) 1.5 – 6.8 0.15 lb 290

Bowfin

Date Gear CPUE Normal Range Avg Weight Total Catch
1987-07-06 Standard gill nets 0.3 (normal) 0.3 – 1.0 2.00 lb 1

Tullibee (Cisco)

Date Gear CPUE Normal Range Avg Weight Total Catch
1987-07-06 Standard gill nets 10.0 (normal) 2.3 – 10.0 0.39 lb 30
1973-07-09 Standard gill nets 24.7 (above normal) 2.3 – 10.0 0.76 lb 74

Black Bullhead

Date Gear CPUE Normal Range Avg Weight Total Catch
1987-07-06 Standard gill nets 0.7 (normal) 0.4 – 3.1 0.60 lb 2

Brown Bullhead

Date Gear CPUE Normal Range Avg Weight Total Catch
1987-07-06 Standard gill nets 0.3 (below normal) 0.4 – 2.5 0.50 lb 1
1973-07-09 Standard trap nets 1.8 (normal) 0.6 – 2.6 0.65 lb 14

Black Crappie

Date Gear CPUE Normal Range Avg Weight Total Catch
1973-07-09 Standard gill nets 0.3 (below normal) 1.0 – 3.9 0.30 lb 1
1973-07-09 Standard trap nets 2.6 (normal) 0.8 – 4.0 0.73 lb 21

White Sucker

Date Gear CPUE Normal Range Avg Weight Total Catch
1973-07-09 Standard gill nets 0.7 (normal) 0.3 – 1.7 1.45 lb 2

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Fish Species

Species known to inhabit Cooper. Click any species for a full fishing guide.

Black CrappieBluegillBowfin (Dogfish)Greater RedhorseHybrid SunfishLargemouth BassNorthern PikeNorthern Pike (Silver Phase)PumpkinseedRock BassYellow BullheadYellow Perch

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Data sourced from Minnesota DNR Division of Fish and Wildlife. Last verified: March 19, 2026. Learn how we maintain this data.