RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Test

Largest measured gudgeon: 16.5 cm

The largest gudgeon measured in Environment Agency surveys of the River Test was 16.5 cm, recorded at Kimbridge, New stream on 16 September 2010.

Across 508 measured gudgeon, the median measured length was 9.2 cm.

Surveyors recorded weights for 300 gudgeon. The median was 0.3 oz (0.009 kg) and the largest recorded weight was 2.5 oz (0.07 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 Test.

See gudgeon records across England →

Most recent observation8 September 2025Romsey Canal · 17 fish
Largest measured gudgeon
16.5 cm
Median length
9.2 cm
Fish measured
508
Survey locations
14

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
16.5 cm16 Sept 2010Kimbridge, New stream123949
16.3 cm30 Sept 2004Mays Island82528
15.3 cm14 Aug 2008Romsey War Memorial Park112942
15.3 cm24 Sept 2002Timsbury main river61524
14.8 cm24 Sept 2002Timsbury main river61524
14.7 cm24 Sept 2002Timsbury main river61524
14.5 cm18 Oct 2011Timsbury carrier restoration site128598
14.5 cm18 Oct 2011Timsbury carrier restoration site128598
14.2 cm13 Sept 2002Compton Carrier55093
14 cm5 Sept 2018Romsey Canal153677

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
Romsey Canal3 Sept 20028 Sept 202515
Fairbourne stream, Brook Farm8 Jul 20148 Jul 20141
Timsbury Mayfly carrier u/s of bridge10 Jul 201210 Jul 20121
Timsbury carrier restoration site18 Oct 201118 Oct 20111
Kimbridge, New stream16 Sept 201016 Sept 20101
Horsebridge16 Sept 200816 Sept 20081
Red River Carrier, Broadlands15 Aug 200815 Aug 20081
Romsey War Memorial Park14 Aug 200814 Aug 20081
Timsbury Manor Carrier20 Oct 20039 Aug 20064
Mays Island30 Sept 200430 Sept 20041
House Beat2 Sept 20042 Sept 20041
Kimbridge main15 Jul 200415 Jul 20041
Timsbury main river24 Sept 200224 Sept 20021
Compton Carrier13 Sept 200213 Sept 20021

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

2002–2025

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 508 measured fish were spread across different length ranges.

Smallest
3.8 cm
Lower quarter
7.8 cm
Median
9.3 cm
Upper quarter
10.6 cm
Largest
16.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 300 gudgeon. This is a subset of the measured fish and may not represent the whole population.

Lightest
0.1 oz (0.002 kg)
Lower quarter
0.2 oz (0.006 kg)
Median
0.3 oz (0.009 kg)
Upper quarter
0.5 oz (0.015 kg)
Heaviest
2.5 oz (0.07 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 Test

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

Brown / sea trout European eel Bullhead Minnow Stone loach Grayling

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 →