RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Laleham Abbey

Largest measured gudgeon: 12.4 cm

The largest gudgeon measured in Environment Agency surveys of the River Laleham Abbey was 12.4 cm, recorded at Laleham Abbey Downstream Fry on 27 August 2003.

Across 1,930 measured gudgeon, the median measured length was 4.8 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 Laleham Abbey.

See gudgeon records across England →

Most recent observation3 September 2025Laleham Abbey Upstream Fry · 8 fish
Largest measured gudgeon
12.4 cm
Median length
4.8 cm
Fish measured
1,930
Survey locations
2

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
12.4 cm27 Aug 2003Laleham Abbey Downstream Fry116980
12.2 cm28 Aug 2013Laleham Abbey Upstream Fry138576
12 cm28 Aug 2013Laleham Abbey Upstream Fry138576
11.8 cm22 Aug 2012Laleham Abbey Upstream Fry135275
11.8 cm25 Aug 2011Laleham Abbey Downstream Fry130105
11.6 cm28 Aug 2013Laleham Abbey Downstream Fry138579
11.5 cm25 Aug 2011Laleham Abbey Downstream Fry130105
11.3 cm3 Sept 2025Laleham Abbey Downstream Fry178519
11.3 cm25 Aug 2011Laleham Abbey Downstream Fry130105
11.3 cm25 Aug 2011Laleham Abbey Downstream Fry130105

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
Laleham Abbey Upstream Fry27 Aug 20033 Sept 202517
Laleham Abbey Downstream Fry27 Aug 20033 Sept 202518

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

2003–2025

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 1,930 measured fish were spread across different length ranges.

Smallest
0.4 cm
Lower quarter
4.2 cm
Median
4.8 cm
Upper quarter
5.5 cm
Largest
12.4 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Laleham Abbey

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

Roach Bleak Chub Dace Perch Minnow

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 →