RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Molesey - Teddington

Largest measured gudgeon: 16.5 cm

The largest gudgeon measured in Environment Agency surveys of the River Molesey - Teddington was 16.5 cm, recorded at Molesey Back Weir on 10 September 2003.

Across 266 measured gudgeon, the median measured length was 10.8 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 Molesey - Teddington.

See gudgeon records across England →

Most recent observation31 July 2025Molesey - Thames Ditton Island, Upper Main Channel · 5 fish
Largest measured gudgeon
16.5 cm
Median length
10.8 cm
Fish measured
266
Survey locations
4

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
16.5 cm10 Sept 2003Molesey Back Weir79188
13.5 cm1 Sept 2000Surbiton Intake to Kingston121609
13.4 cm11 Sept 2015Molesey Weir Pool146410
13.2 cm9 Sept 2016Molesey - Thames Ditton Island, Upper Main Channel149695
12.9 cm6 Sept 2018Molesey - Thames Ditton Island, Upper Main Channel153289
12.9 cm11 Sept 2012Molesey Weir Pool133452
12.8 cm14 Sept 2005Molesey Weir Pool86284
12.7 cm6 Sept 2018Molesey - Thames Ditton Island, Upper Main Channel153289
12.7 cm15 Sept 2006Molesey - Thames Ditton Island, Upper Main Channel101394
12.5 cm6 Sept 2018Molesey - Thames Ditton Island, Upper Main Channel153289

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
Molesey - Thames Ditton Island, Upper Main Channel1 Sept 199531 Jul 202514
Molesey Weir Pool1 Sept 199510 Sept 20168
Molesey Back Weir10 Sept 200310 Sept 20031
Surbiton Intake to Kingston1 Sept 19951 Sept 20002

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

1995–2025

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 266 measured fish were spread across different length ranges.

Smallest
4.6 cm
Lower quarter
7.7 cm
Median
10.8 cm
Upper quarter
11.5 cm
Largest
16.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Molesey - Teddington

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

Roach Perch Chub Pike Dace Bleak

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 →