RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Colne

Largest measured gudgeon: 18.8 cm

The largest gudgeon measured in Environment Agency surveys of the River Colne was 18.8 cm, recorded at Elms Hall on 2 June 2005.

Across 8,129 measured gudgeon, the median measured length was 9.3 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 Colne.

See gudgeon records across England →

Most recent observation16 June 2026Blue Bridge · 15 fish
Largest measured gudgeon
18.8 cm
Median length
9.3 cm
Fish measured
8,129
Survey locations
30

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
18.8 cm2 Jun 2005Elms Hall86395
17.1 cm16 May 1984Spring Lane13880
16.5 cm5 Jun 2017Wakes Colne Viaduct150776
16.5 cm16 May 1984Spring Lane13880
16.3 cm24 Sept 1987Halstead13915
16.3 cm16 May 1984Spring Lane13880
16.2 cm16 May 1984Spring Lane13880
16 cm16 May 1984Spring Lane13880
16 cm16 May 1984Spring Lane13880
15.8 cm29 Aug 1990Wakes Colne Viaduct13934

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
Blue Bridge12 Apr 198416 Jun 202612
Brook Street Farm10 Sept 198710 Jun 202611
Box Mill11 Apr 19843 Jun 202614
Wakes Colne Viaduct14 Aug 19872 Jun 202620
Fordstreet11 May 198414 May 202614
Spring Lane16 May 19847 May 202621
Earls Colne FGS13 Apr 19846 May 202621
Cooks Mill18 May 198428 Apr 202613
Downstream New Bridge17 May 19848 Jun 202312
Broom House14 May 19847 Jun 202312
Chalkney Mill17 Apr 19842 Jun 202312
Maplestead Mill10 Apr 198411 Jun 201410
Cricket Ground24 Jul 199030 Apr 201411
Upstream A12 Bridge (Silver eel)4 Jan 20126 Jan 20122
Lexden FGS Upstream (Silver eel)5 Jan 20126 Jan 20122
Lexden FGS Downstream (Silver eel)2 Dec 20112 Dec 20111
North Bridge12 Aug 199312 May 20116
Swanscombe Farm12 Aug 198718 Jun 20088
The Hedinghams8 May 198416 Jun 20082
Halstead24 Sept 198710 Jun 20086
Earls Colne Mill16 Apr 19846 Jun 20085
Elms Hall20 Aug 19875 Jun 20087
Fiddlers Mill11 Aug 19872 Jun 20087
Upstream A12 Bridge21 May 198413 May 20088
Bathing Pool22 May 19849 May 20086
Castle Park23 May 19847 May 20085
Great Porters Farm22 Sept 199322 Sept 19931
Upstream Blue Bridge17 Sept 199016 Sept 19932
Does Corner19 Sept 199019 Sept 19901
Nunnery Bridge25 Sept 198725 Sept 19871

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

1984–2026

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 8,129 measured fish were spread across different length ranges.

Smallest
2.4 cm
Lower quarter
8.1 cm
Median
9.3 cm
Upper quarter
10.8 cm
Largest
18.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Colne

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

Roach European eel Dace Pike Perch Stone loach

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 →