RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Ivel

Largest measured gudgeon: 16.8 cm

The largest gudgeon measured in Environment Agency surveys of the River Ivel was 16.8 cm, recorded at DS Iron Bridge on 7 January 1992.

Across 1,659 measured gudgeon, the median measured length was 9.8 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 Ivel.

See gudgeon records across England →

Most recent observation8 October 2025Henlow · 44 fish
Largest measured gudgeon
16.8 cm
Median length
9.8 cm
Fish measured
1,659
Survey locations
14

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
16.8 cm7 Jan 1992DS Iron Bridge29258
16.3 cm23 Jul 1998DS Iron Bridge29268
14.8 cm9 Jun 1989Biggleswade Common29249
14.4 cm8 May 2013Henlow135961
14.3 cm7 Jan 1992DS Iron Bridge29258
14.3 cm7 Jan 1992DS Iron Bridge29258
14.3 cm9 Jun 1989Biggleswade Common29249
14.3 cm8 Jun 1989DS Iron Bridge29248
14.3 cm8 Jun 1989DS Iron Bridge29248
14.3 cm8 Jun 1989DS Iron Bridge29248

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
Henlow13 Mar 19898 Oct 202517
Girtford Weir7 Jul 198930 Apr 202510
Biggleswade Common9 Jun 198929 Apr 202512
DS Iron Bridge8 Jun 19899 Apr 202516
Gt Ouse Confluence12 Jun 198919 May 201615
Broom Mill11 Jul 198917 May 20055
High Romper Bridge23 Jun 198913 May 20054
Langford Nursery14 Mar 198929 Apr 20055
Saw Mills Tempsford22 Aug 200322 Aug 20031
Henlow Control Site3 May 20003 May 20001
Beeston5 Jul 198930 Jul 19982
Sandy27 Jan 199229 Jul 19983
Astwick2 Jan 199227 May 19983
Girtford Bridge11 May 199511 May 19951

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

1989–2025

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 1,659 measured fish were spread across different length ranges.

Smallest
3 cm
Lower quarter
8.3 cm
Median
9.8 cm
Upper quarter
10.8 cm
Largest
16.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ivel

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

Chub Pike Roach Dace Bullhead 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 →