RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Wallers Haven

Largest measured gudgeon: 14 cm

The largest gudgeon measured in Environment Agency surveys of the River Wallers Haven was 14 cm, recorded at Downstream Tilley Bridge on 29 June 2010.

Across 53 measured gudgeon, the median measured length was 8 cm.

Surveyors recorded weights for 31 gudgeon. The median was 0.2 oz (0.006 kg) and the largest recorded weight was 0.5 oz (0.015 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 Wallers Haven.

See gudgeon records across England →

Most recent observation9 September 2025Upstream Boreham Bridge · 2 fish
Largest measured gudgeon
14 cm
Median length
8 cm
Fish measured
53
Survey locations
5

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 cm29 Jun 2010Downstream Tilley Bridge123014
13.7 cm29 Jun 2010Downstream Tilley Bridge123014
13.5 cm29 Jun 2010Downstream Tilley Bridge123014
12.4 cm29 Jun 2010Downstream Tilley Bridge123014
11 cm29 Jun 2010Downstream Tilley Bridge123014
11 cm29 Jun 2010Downstream Tilley Bridge123014
10.5 cm12 Sept 2006Upstream Boreham Bridge102722
10 cm29 Jun 2010Downstream Tilley Bridge123014
9.9 cm12 Sept 2006Upstream Boreham Bridge102722
9.6 cm22 Oct 2009Upstream Boreham Bridge120641

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
Upstream Boreham Bridge29 Aug 20039 Sept 20256
Horse Bridge7 Sept 20167 Sept 20161
Middle Bridge5 Jul 20165 Jul 20161
Downstream Tilley Bridge29 Jun 201029 Jun 20101
Nunningham Stream21 Jan 200021 Jan 20001

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

2000–2025

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 53 measured fish were spread across different length ranges.

Smallest
4.6 cm
Lower quarter
7 cm
Median
8 cm
Upper quarter
9 cm
Largest
14 cm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 31 gudgeon. This is a subset of the measured fish and may not represent the whole population.

Lightest
0 oz (0.001 kg)
Lower quarter
0.1 oz (0.004 kg)
Median
0.2 oz (0.006 kg)
Upper quarter
0.2 oz (0.007 kg)
Heaviest
0.5 oz (0.015 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 Wallers Haven

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

Perch European eel Roach Pike Common bream Bullhead

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 →