RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Wensum (central)

Largest measured gudgeon: 17.7 cm

The largest gudgeon measured in Environment Agency surveys of the River Wensum (central) was 17.7 cm, recorded at Hellesdon Road (Albert's) on 5 October 2023.

Across 3,330 measured gudgeon, the median measured length was 9.8 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 Wensum (central).

See gudgeon records across England →

Most recent observation10 September 2025Swanton Morley · 41 fish
Largest measured gudgeon
17.7 cm
Median length
9.8 cm
Fish measured
3,330
Survey locations
34

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
17.7 cm5 Oct 2023Hellesdon Road (Albert's)164301
17.4 cm15 Sept 2022Hellesdon Road (Albert's)162016
17 cm5 Aug 2022Swanton Morley161900
16.4 cm7 Aug 2025Downstream Elsing Mill177856
16.2 cm7 Sept 2010U/s Billingford Rd Bridge123785
15.6 cm10 Aug 2015Downstream Elsing Mill145876
15.6 cm19 Sept 2006Swanton Morley101848
15.1 cm10 Jun 1986Pensthorpe Hall17212
15 cm19 Oct 2017Sparham pool, Lyng152393
14.6 cm22 Sept 2003Downstream Attlebridge Bridge77261

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
Swanton Morley23 Jun 198610 Sept 202521
Hellesdon Road (Albert's)4 Aug 199715 Aug 202521
Alders Spinney22 Jul 198614 Aug 202522
Downstream Elsing Mill23 Jun 19867 Aug 202525
Downstream Gt Ryburgh Bridge9 Jun 19861 Aug 202525
Sparham pool, Lyng26 Sept 20136 Sept 20246
County School18 Jun 198620 Aug 202411
Upstream Bintree Mill12 Jun 198623 Jul 20249
Upstream Lenwade Mill1 Jul 198611 Sept 20187
Pensthorpe Hall10 Jun 19867 Aug 20189
U/s Billingford Rd Bridge7 Sept 201028 Sept 20112
Blakes Meadow17 Jul 19869 Oct 20096
Upstream Drayton Green Lane28 Aug 19908 Oct 20093
Lyng Pits27 Jul 19901 Oct 20095
Downstream Ringland Bridge10 Jul 198630 Sept 20096
Upstream Gt Ryburgh5 Jun 198628 Sept 20096
Downstream Guist Bridge17 Jun 198624 Sept 20092
Attlebridge Hall Farm8 Jul 198623 Sept 20097
Walcis' Hill Meadow6 Oct 20036 Oct 20031
Downstream Attlebridge Bridge7 Jul 198622 Sept 20035
Downstream Billingford Bridge19 Jun 198612 Aug 20025
Edwards & Holmes Yard11 Aug 19866 Aug 19972
Heigham Waterworks5 Aug 19975 Aug 19971
Costessey Pits15 Jul 198624 Jul 19974
Downstream Point Costessey28 Jul 19869 Jul 19973
Walcis Farm30 Jun 19866 Jun 19974
Swan Rescue24 Jul 19865 Jun 19973
Castle Farm25 Jun 19867 May 19973
Pinewood23 Jul 198619 Jul 19943
Sennowe Park10 Jun 198625 May 19943
Upstream Costessey Mill16 Sept 198621 Aug 19902
Upstream Paddling Pool13 Aug 198613 Aug 19861
St Martins Close12 Aug 198612 Aug 19861
Upstream Taverham Mill14 Jul 198614 Jul 19861

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

1986–2025

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 3,330 measured fish were spread across different length ranges.

Smallest
1.7 cm
Lower quarter
8.3 cm
Median
9.8 cm
Upper quarter
11 cm
Largest
17.7 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Wensum (central)

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

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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 →