RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Staines

Largest measured gudgeon: 14 cm

The largest gudgeon measured in Environment Agency surveys of the River Staines was 14 cm, recorded at Staines Upstream Fry on 18 August 2010.

Across 1,900 measured gudgeon, the median measured length was 4.3 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 Staines.

See gudgeon records across England →

Most recent observation3 September 2025Staines Upstream Fry · 189 fish
Largest measured gudgeon
14 cm
Median length
4.3 cm
Fish measured
1,900
Survey locations
2

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
14 cm18 Aug 2010Staines Upstream Fry124730
13.8 cm25 Aug 2011Staines Upstream Fry130101
13.2 cm25 Aug 2011Staines Upstream Fry130101
12.9 cm25 Aug 2011Staines Upstream Fry130101
12.8 cm20 Aug 2015Staines Downstream Fry146053
12.7 cm20 Aug 2015Staines Downstream Fry146053
12.7 cm20 Aug 2015Staines Downstream Fry146053
12.7 cm25 Aug 2011Staines Upstream Fry130101
12.7 cm25 Aug 2011Staines Upstream Fry130101
12.6 cm20 Aug 2015Staines Downstream Fry146053

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
Staines Upstream Fry9 Sept 20043 Sept 202517
Staines Downstream Fry9 Sept 20043 Sept 202515

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

2004–2025

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 1,900 measured fish were spread across different length ranges.

Smallest
1.6 cm
Lower quarter
3.5 cm
Median
4.3 cm
Upper quarter
5.4 cm
Largest
14 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Staines

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

Dace Roach Chub Minnow Bleak 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 →