RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Deben (Main Reaches)

Largest measured gudgeon: 13 cm

The largest gudgeon measured in Environment Agency surveys of the River Deben (Main Reaches) was 13 cm, recorded at Naunton Hall to Loudham Mill on 25 February 2004.

Across 305 measured gudgeon, the median measured length was 5.5 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 Deben (Main Reaches).

See gudgeon records across England →

Most recent observation19 September 2025Ufford Hole Fry Survey · 271 fish
Largest measured gudgeon
13 cm
Median length
5.5 cm
Fish measured
305
Survey locations
12

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
13 cm25 Feb 2004Naunton Hall to Loudham Mill103982
12.7 cm3 Aug 1994Naunton Hall Farm4080
11.9 cm3 Aug 1994Naunton Hall Farm4080
11.8 cm3 Aug 1994Naunton Hall Farm4080
11.6 cm3 Aug 1994Naunton Hall Farm4080
11.6 cm3 Aug 1994Naunton Hall Farm4080
11.4 cm3 Aug 1994Naunton Hall Farm4080
11.4 cm3 Aug 1994Naunton Hall Farm4080
11.2 cm27 Feb 2004Wickham Market to Loudham103981
11.2 cm10 Dec 1987Low Farm4060

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
White Womans Lane Fry Survey26 Sept 202419 Sept 20252
Ufford Hole Fry Survey26 Sept 202419 Sept 20252
Ufford28 Nov 199714 Apr 20255
Downstream Glevering Hall28 Apr 201011 Apr 20253
Downstream Wickham Market9 Dec 198729 Apr 20103
Wickham Market to Loudham27 Feb 200427 Feb 20041
Naunton Hall to Loudham Mill25 Feb 200425 Feb 20041
Melton Mill to Ufford Mill19 Feb 200419 Feb 20041
Naunton Hall Farm5 Jun 19912 Dec 19973
Low Farm10 Dec 19871 Dec 19972
Melton Sluice27 Nov 199727 Nov 19971
Loudham Decoy3 Aug 19943 Aug 19941

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

1987–2025

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 305 measured fish were spread across different length ranges.

Smallest
2.2 cm
Lower quarter
3.6 cm
Median
5.5 cm
Upper quarter
8.4 cm
Largest
13 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Deben (Main Reaches)

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

Roach Pike European eel Perch Stone loach 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 →