Gudgeon · Gobio gobio

Gudgeon in the River Thames Tribs

Largest measured gudgeon: 13.5 cm

The largest gudgeon measured in Environment Agency surveys of the River Thames Tribs was 13.5 cm, recorded at Odney Stream on 5 August 2009.

Across 157 measured gudgeon, the median measured length was 10.9 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 Thames Tribs.

See gudgeon records across England →

Most recent observation5 November 2019Roundmoor Ditch · 2 fish

Largest measured gudgeon: 13.5 cm
Median length: 10.9 cm
Fish measured: 157
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.

Length	Survey date	Survey location	Survey ID
13.5 cm	5 Aug 2009	Odney Stream	118297
13.5 cm	22 Apr 2009	Tangier Mill Stream	121834
13.4 cm	6 Oct 2006	Bray Mill Stream	101770
13.4 cm	8 Aug 2006	Odney Stream	100523
13.3 cm	29 Sept 2009	Bray Mill Stream	119152
13.1 cm	5 Aug 2009	Odney Stream	118297
13 cm	23 Sept 2015	Odney Stream	146676
12.8 cm	6 Oct 2006	Bray Mill Stream	101770
12.6 cm	21 Sept 2015	Bray Mill Stream	146675
12.6 cm	5 Aug 2009	Odney Stream	118297

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 surveyed	First recorded	Last recorded	Visits finding gudgeon
Roundmoor Ditch	5 Nov 2019	5 Nov 2019	1
Odney Stream	8 Aug 2006	23 Sept 2015	3
Bray Mill Stream	6 Oct 2006	21 Sept 2015	3
Tangier Mill Stream	22 Apr 2009	22 Apr 2009	1

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

2006–2019

Survey records by year

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

206

007

008

309

010

011

012

013

014

215

016

017

018

119

Fish measured by surveyors

Measured length distribution

See how the 157 measured fish were spread across different length ranges.

Smallest: 3.9 cm
Lower quarter: 9.5 cm
Median: 10.9 cm
Upper quarter: 11.6 cm
Largest: 13.5 cm

0–99 mm

100–199 mm

106

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Thames Tribs

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

Chub Dace Roach European eel Perch Barbel

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 →