Gudgeon · Gobio gobio

Gudgeon in the River Brent

Largest measured gudgeon: 15 cm

The largest gudgeon measured in Environment Agency surveys of the River Brent was 15 cm, recorded at Elthorpe Park River Brent (GUC) on 27 October 1994.

Across 497 measured gudgeon, the median measured length was 10.1 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 Brent.

See gudgeon records across England →

Most recent observation17 October 2024Greenford Bridge · 25 fish

Largest measured gudgeon: 15 cm
Median length: 10.1 cm
Fish measured: 497
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
15 cm	27 Oct 1994	Elthorpe Park River Brent (GUC)	103483
14.5 cm	17 Mar 1999	Hanwell Bridge	73571
13.6 cm	17 Oct 2023	Greenford Bridge	164454
13.5 cm	17 Mar 1999	Hanwell Bridge	73571
13.4 cm	17 Oct 2024	Greenford Bridge	168390
13.2 cm	17 Oct 2024	Greenford Bridge	168390
13.1 cm	17 Mar 1999	Hanwell Bridge	73571
13 cm	17 Mar 1999	Hanwell Bridge	73571
13 cm	17 Mar 1999	Hanwell Bridge	73571
12.8 cm	17 Oct 2023	Greenford Bridge	164454

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
Greenford Bridge	16 Mar 1999	17 Oct 2024	6
Hanwell Bridge	17 Mar 1999	15 Oct 2024	6
Boston Manor Park (Brent/GUC)	3 Nov 1994	3 Nov 1994	1
Elthorpe Park River Brent (GUC)	27 Oct 1994	27 Oct 1994	1

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

1994–2024

Survey records by year

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

294

095

096

097

098

299

000

001

002

003

004

105

006

007

008

009

210

011

012

013

014

015

216

017

018

019

020

021

122

223

224

Fish measured by surveyors

Measured length distribution

See how the 497 measured fish were spread across different length ranges.

Smallest: 2.7 cm
Lower quarter: 8.4 cm
Median: 10.1 cm
Upper quarter: 11 cm
Largest: 15 cm

0–99 mm

220

100–199 mm

277

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Brent

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

Perch Roach 3-spined stickleback European eel Common carp Dace

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 →