RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Chelmer

Largest measured gudgeon: 18 cm

The largest gudgeon measured in Environment Agency surveys of the River Chelmer was 18 cm, recorded at Warners Farm on 30 September 1983.

Across 2,866 measured gudgeon, the median measured length was 10.4 cm.

Surveyors recorded weights for 6 gudgeon. The median was 0.5 oz (0.0145 kg) and the largest recorded weight was 2.4 oz (0.067 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Chelmer.

See gudgeon records across England →

Most recent observation25 September 2025Chelmsford Viaduct · 7 fish
Largest measured gudgeon
18 cm
Median length
10.4 cm
Fish measured
2,866
Survey locations
39

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 cm30 Sept 1983Warners Farm60503
18 cm28 Sept 1983Camsix Farm B60701
18 cm28 Sept 1983Camsix Farm A60700
17.6 cm28 Sept 1983Camsix Farm B60701
17.2 cm28 Sept 1983Camsix Farm B60701
17 cm28 Sept 1983Camsix Farm B60701
17 cm28 Sept 1983Camsix Farm B60701
17 cm21 Sept 1983Langleys Dunmow60400
16.8 cm7 Sept 1989Langleys Dunmow14335
16.8 cm30 Sept 1983Warners Farm60503

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
Chelmsford Viaduct14 Oct 198325 Sept 20258
Camsix Farm A28 Sept 198323 Sept 202512
Upstream Croxtons10 Oct 198320 Aug 202510
Langleys Dunmow21 Sept 198319 Aug 20259
Barnes Mill10 Jul 19864 Jul 20255
Cuton Hall8 Jul 198616 Jun 20257
Boreham Bridge (C&B Canal)13 Jul 199213 Jun 20258
Hoe Mill Cut27 Jun 198912 Jun 202511
Sugar Mills30 Jun 19896 Jun 20256
Downstream Ricketts Lock23 Jun 19865 Jun 202511
Warners Farm30 Sept 198312 Oct 202211
Downstream Paper Mills26 Jun 198628 Jun 20224
Ricketts Cut25 Jun 198626 Jun 201911
Felstead A23 Sept 19836 Oct 201612
Little Waltham1 Sept 198621 Sept 20168
Brookend9 Jul 198619 Jul 20164
Bowyers Bridge9 Feb 199821 Mar 20142
Littley Park4 Sept 198619 Aug 201310
Upstream Beeleigh Lock15 Oct 19863 Nov 20103
Absol Bridge26 Sept 198321 Sept 201010
Springfield11 Oct 198325 Aug 20108
Upstream Paper Mills28 Oct 198625 Oct 20073
Churchend FGS19 Sept 198322 Aug 20079
Downstream Croxtons7 Oct 198310 Aug 20076
Langley Waltham3 Oct 19838 Aug 20075
Ulting Church19 Jun 198612 Jun 20075
Upstream Rushes Lock27 Oct 198618 Oct 20045
Hoe Mill10 Oct 198914 Oct 20042
A12 Bridge (C&B Canal)11 Jul 198621 Jul 20045
Gasworks Reach15 Nov 199515 Nov 19951
Upstream Sandford Lock3 Nov 19866 Nov 19952
Cuton Lock10 Nov 19862 Nov 19954
Downstream Stonhams Lock1 Nov 19951 Nov 19951
Hoffmans Mill12 Oct 19834 Oct 19953
Sandford30 Oct 19862 Nov 19923
Upstream Ricketts Lock12 Oct 199212 Oct 19921
Sandford Cut12 Jul 198912 Jul 19891
Kings Mill3 Jul 19865 Jul 19892
Camsix Farm B28 Sept 198328 Sept 19831

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

1983–2025

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 2,866 measured fish were spread across different length ranges.

Smallest
4.3 cm
Lower quarter
9.1 cm
Median
10.4 cm
Upper quarter
11.8 cm
Largest
18 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 6 gudgeon. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.4 oz (0.011 kg)
Lower quarter
0.4 oz (0.0125 kg)
Median
0.5 oz (0.0145 kg)
Upper quarter
1 oz (0.0278 kg)
Heaviest
2.4 oz (0.067 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the River Chelmer

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

Chub Roach Pike Dace European eel Perch

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 →