Gudgeon · Gobio gobio

Gudgeon in the River Wensum (upper)

Largest measured gudgeon: 17.8 cm

The largest gudgeon measured in Environment Agency surveys of the River Wensum (upper) was 17.8 cm, recorded at Fakenham Common on 25 April 1994.

Across 263 measured gudgeon, the median measured length was 12.3 cm.

Surveyors recorded one individual weight: 1.7 oz (0.048 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 Wensum (upper).

See gudgeon records across England →

Most recent observation2 September 2025Upstream Fakenham Mill · 29 fish

Largest measured gudgeon: 17.8 cm
Median length: 12.3 cm
Fish measured: 263
Survey locations: 7

Individual EA measurements

Largest measured gudgeon

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

Length	Survey date	Survey location	Survey ID
17.8 cm	25 Apr 1994	Fakenham Common	17202
16.2 cm	16 Oct 2012	Fakenham Common	134360
16 cm	3 Sept 2024	Upstream Fakenham Mill	167171
16 cm	25 Apr 1994	Fakenham Common	17202
15.7 cm	22 May 2003	Hellhoughton Common	76195
15.7 cm	25 Apr 1994	Fakenham Common	17202
15.7 cm	25 Apr 1994	Fakenham Common	17202
15.5 cm	25 Apr 2017	Upstream Fakenham Mill	150746
15.5 cm	12 Sept 2012	Upstream Fakenham Mill	133558
15.5 cm	21 Apr 1994	Upstream Fakenham Mill	17201

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 surveyed	First recorded	Last recorded	Visits finding gudgeon
Upstream Fakenham Mill	1 May 1990	2 Sept 2025	15
Fakenham Common	20 Mar 1986	14 Jun 2018	8
South Mill Farm	18 Apr 1994	4 Apr 2017	4
Hellhoughton Common	22 May 2003	22 May 2003	1
Upstream Sculthorpe Mill	20 Apr 1994	4 Apr 1997	2
Downstream Doughton Bridge	27 Apr 1990	3 Apr 1997	2
Sculthorpe Moor	18 Mar 1986	18 Mar 1986	1

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.

286

087

088

089

390

091

092

093

494

095

096

597

098

099

000

001

002

303

004

005

006

007

008

209

010

111

212

113

114

015

016

217

218

119

020

021

122

123

124

125

Fish measured by surveyors

Measured length distribution

See how the 263 measured fish were spread across different length ranges.

Smallest: 3 cm
Lower quarter: 10.1 cm
Median: 12.3 cm
Upper quarter: 13.5 cm
Largest: 17.8 cm

0–99 mm

100–199 mm

205

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

One individual weight was recorded for this fish and river. This is a subset of the measured fish and may not represent the whole population.

Recorded weight: 1.7 oz (0.048 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 Wensum (upper)

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

Brown / sea trout Stone loach Bullhead European eel 3-spined stickleback Brook lamprey

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 →