RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Lee

Largest measured gudgeon: 20.3 cm

The largest gudgeon measured in Environment Agency surveys of the River Lee was 20.3 cm, recorded at Woolmers Park on 3 August 2023.

Across 6,048 measured gudgeon, the median measured length was 10.3 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 Lee.

See gudgeon records across England →

Most recent observation23 July 2026Amwell Loop · 16 fish
Largest measured gudgeon
20.3 cm
Median length
10.3 cm
Fish measured
6,048
Survey locations
27

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
20.3 cm3 Aug 2023Woolmers Park162860
19.8 cm8 Aug 2017Fishers Green151275
19.4 cm7 Aug 2006Wheathampstead100768
19.1 cm16 Apr 2008Batford110761
18.9 cm30 Sept 2004Woolmers Park82597
18.8 cm3 Aug 2022Stanborough Park161697
18 cm5 Sept 2007Hackney Marshes106717
18 cm16 Sept 2005Stanborough Park86796
16.9 cm10 Aug 2006Essendon100910
16.4 cm8 Mar 1978Waterend116708

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
Amwell Loop12 Apr 197823 Jul 202617
Fishers Green6 Sept 19787 Jul 202618
Wheathampstead18 Oct 20029 Jun 202621
Hackney Marshes11 Nov 200311 Sept 202512
Waterdale31 Oct 200331 Jul 202512
Stanborough Park10 Sept 200324 Jun 202513
Hyde Mill9 Sept 200317 Jun 202512
Woolmers Park1 Nov 20023 Aug 202311
Fallowfield16 Sept 202116 Sept 20211
Red Spinners Bayford26 Jun 201926 Jun 20191
Hartham Leisure centre24 Jun 201924 Jun 20191
Hartham Common24 Oct 200221 Jun 201813
Fishers Green barbel investigation3 Nov 20173 Nov 20171
Kings Weir2 Jun 20152 Jun 20151
Batford16 Apr 200819 Jun 20142
Kings Weir Back Loop14 May 201329 May 20142
Essendon11 Sept 200326 Jun 20139
Stonebridge to Tottenham Lock12 Oct 201012 Oct 20101
Tottenham Lock d/s8 Oct 20098 Oct 20091
Waterend8 Mar 197817 Apr 20082
Bush hall27 Nov 200727 Nov 20071
Bayford15 Sept 200427 Oct 20062
Flour Mills Loop25 Sept 200311 Nov 20042
Hertford County Hall AS28 Nov 200328 Nov 20031
Hertford Football Ground29 Mar 197829 Mar 19781
Water Hall Farm22 Mar 197822 Mar 19781
Downstream Cecil Saw Mills15 Mar 197815 Mar 19781

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

1978–2026

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 6,048 measured fish were spread across different length ranges.

Smallest
1 cm
Lower quarter
8.9 cm
Median
10.3 cm
Upper quarter
11.8 cm
Largest
20.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Lee

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

Roach Perch Minnow Chub Pike 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 →