RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Calder

Largest measured gudgeon: 18.7 cm

The largest gudgeon measured in Environment Agency surveys of the River Calder was 18.7 cm, recorded at Elland power Station d/s on 31 July 2006.

Across 3,581 measured gudgeon, the median measured length was 9.2 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Calder.

See gudgeon records across England →

Most recent observation14 August 2025Dewsbury Fry Survey · 420 fish
Largest measured gudgeon
18.7 cm
Median length
9.2 cm
Fish measured
3,581
Survey locations
18

Individual EA measurements

Largest measured gudgeon

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
18.7 cm31 Jul 2006Elland power Station d/s101598
18.6 cm24 Jul 2006Dewsbury (end of flood relief channel)101587
17.3 cm28 Jul 2006Methley101581
16.4 cm27 Jul 2006Chantry Bridge101637
15.8 cm5 Aug 2007Chantry Bridge108396
15.3 cm12 Jul 1999Cornmill Weir109493
15.3 cm12 Jul 1999Cornmill Weir109493
15.3 cm2 Jul 1999Us Elland Power station109487
14.9 cm11 Jul 2003Chantry Bridge78544
14.8 cm12 Jul 1999Cornmill Weir109493

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where gudgeon were found

Each point marks a survey location with at least one gudgeon record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyedFirst recordedLast recordedVisits finding gudgeon
Dewsbury Fry Survey22 Aug 201714 Aug 20254
Dewsbury (end of flood relief channel)17 Sept 200423 Jul 20248
Elland power Station d/s9 Jul 19992 Jul 202410
Chantry Bridge10 Jul 200224 Jun 202412
Brighouse - Fry Survey11 Sept 201018 Aug 20153
Smalley Bight7 Jul 200624 Jun 20152
Sands Mill (Dewsbury)22 Jun 201522 Jun 20151
Cornmill Weir12 Jul 199919 Jun 201510
Brighouse Industrial Estate8 Jul 19996 Jul 20109
Methley28 Jul 20068 Jul 20092
Ravensthorpe at weir (old site)11 Jul 200215 Jul 20032
Anchor Pits - Fry Survey22 Sept 199926 Sept 20024
Downstream Sowerby Bridge5 Jul 19995 Jul 19991
Brookfoot5 Jul 19995 Jul 19991
Us Elland Power station2 Jul 19992 Jul 19991
Elland Weirs2 Jul 19992 Jul 19991
High Royds S.T.W25 Jun 199925 Jun 19991
Elland - Fry Survey21 Sept 198417 Sept 19976

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

1984–2025

Survey records by year

Each bar shows how many survey visits recorded gudgeon that year.

Fish measured by surveyors

Measured length distribution

See how the 3,581 measured fish were spread across different length ranges.

Smallest
0.1 cm
Lower quarter
7.5 cm
Median
9.2 cm
Upper quarter
11 cm
Largest
18.7 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Calder

Compare other species with enough survey and measurement data for a detailed page.

Brown / sea trout Stone loach Bullhead Chub Roach Perch

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →