RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Stour

Largest measured gudgeon: 24.6 cm

The largest gudgeon measured in Environment Agency surveys of the River Stour was 24.6 cm, recorded at Kedington Radial Gate on 9 October 1991.

Across 15,716 measured gudgeon, the median measured length was 10.1 cm.

Surveyors recorded weights for 62 gudgeon. The median was 1.4 oz (0.04 kg) and the largest recorded weight was 2.2 oz (0.062 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 Stour.

See gudgeon records across England →

Most recent observation11 August 2025Mill Meadow · 2 fish
Largest measured gudgeon
24.6 cm
Median length
10.1 cm
Fish measured
15,716
Survey locations
49

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
24.6 cm9 Oct 1991Kedington Radial Gate13618
24.3 cm7 Nov 1994Great Thurlow13666
21.4 cm24 Jul 2007Anchor Bridge106140
19.2 cm24 Jul 2007Anchor Bridge106140
19 cm3 Oct 1985Mill Farm Clare13520
16.9 cm10 Nov 1994Kedington Radial Gate13664
16.9 cm9 Oct 1991Kedington Radial Gate13618
16.8 cm19 Sept 1991Bush Boake Allen13605
16.5 cm21 Oct 1980Rats Castle77514
16.5 cm21 Oct 1980Rats Castle77514

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
Mill Meadow29 Sept 198111 Aug 202522
Bures Mill16 Aug 19885 Aug 202521
Tendring Hall20 Jul 19884 Aug 20257
Lamarsh FGS A24 Jul 198530 Jul 202521
Pitmire A27 Sept 198829 Jul 202521
Anchor Bridge19 Jul 198324 Jul 202528
Higham Hall4 Jul 198523 Jul 202513
Fen Bridge23 Aug 198315 Jul 202516
Stratford28 Jul 198310 Jul 20259
Rats Castle21 Oct 198023 Sept 202418
Great Thurlow25 Sept 198018 Sept 202412
Bower Hall18 Oct 19853 Sept 202413
Kedington Radial Gate15 Oct 198528 Aug 202414
Mill Farm Clare14 Oct 198023 Aug 202415
Bush Boake Allen5 Nov 198014 Aug 202415
Boxted Mill11 Jul 198513 Aug 202416
Wormingford Mill19 Nov 19817 Aug 202413
Pentlow Mill12 Oct 198831 Jul 20249
Wiston Mill8 Aug 198817 Jul 20247
Downstream Dedham Mill19 Aug 19833 Jul 202413
Upstream Dedham Mill10 Jun 198519 Jun 20246
Bures Bridge A29 Sept 19884 Jul 202312
Clare Mill17 Oct 19855 Nov 202110
Baythorne End4 Oct 198525 Oct 20218
Liston Mill10 Oct 19885 Oct 201814
Wixoe Pumping Station24 Sept 198510 Sept 201811
Shalford Weir30 Sept 19819 Aug 201615
Flatford Mill25 Aug 19831 Jul 20154
Wissington18 Jul 198517 Jul 201416
Bakers Mill A11 Nov 198129 Jul 201016
Little Thurlow18 Sept 199728 Sept 20095
Little Wratting10 Oct 19858 Sept 20099
Pentlow Street28 Oct 198021 Aug 200910
Kedington FGS9 Oct 198521 Aug 20099
Garnons Farm26 Jul 198316 Jul 20096
Wick Farm20 Jul 19833 Jul 20098
Stoke By Clare8 Oct 19855 Oct 20068
Mill Green Radial Gate25 Oct 198827 Sept 20067
Brundon (River Stour Middle)1 Aug 198517 Aug 20067
Shalford Meadow14 Aug 199111 Aug 20065
Brantham Lock12 Jun 198529 Jun 20063
Langham Intake14 Jul 198815 Jun 20047
Rodbridge Park23 Sept 198121 Aug 20035
Great Bradley (headwater)6 Oct 20006 Oct 20001
Dedham (Old) River24 Aug 198328 Jun 20004
Glemsford Pits21 Oct 198526 Aug 19975
Priory Meadow29 Jul 19856 Oct 19882
Cattawade30 Aug 198330 Aug 19831
Stratford St Mary Mill Pool27 Jul 198327 Jul 19831

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

1980–2025

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 15,716 measured fish were spread across different length ranges.

Smallest
2 cm
Lower quarter
8.7 cm
Median
10.1 cm
Upper quarter
11.3 cm
Largest
24.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 62 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
0.8 oz (0.024 kg)
Median
1.4 oz (0.04 kg)
Upper quarter
1.8 oz (0.0498 kg)
Heaviest
2.2 oz (0.062 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 Stour

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

Roach European eel Perch Pike Chub 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 →