RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Bulbourne

Largest measured gudgeon: 19.1 cm

The largest gudgeon measured in Environment Agency surveys of the River Bulbourne was 19.1 cm, recorded at Boxmoor d/s on 14 May 2019.

Across 282 measured gudgeon, the median measured length was 10.8 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 Bulbourne.

See gudgeon records across England →

Most recent observation14 May 2019Boxmoor d/s · 2 fish
Largest measured gudgeon
19.1 cm
Median length
10.8 cm
Fish measured
282
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
19.1 cm14 May 2019Boxmoor d/s154505
15.2 cm3 May 2017Boxmoor d/s150377
14.9 cm31 May 2018Boxmoor d/s152624
14.7 cm2 May 2018Boxmoor u/s152535
14.5 cm14 May 2019Boxmoor u/s154504
14.5 cm24 Apr 2015Boxmoor d/s144601
14.4 cm31 May 2018Boxmoor d/s152624
14.4 cm24 Apr 2015Boxmoor u/s144597
14.3 cm2 May 2018Boxmoor u/s152535
14.2 cm14 May 2019Boxmoor u/s154504

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
Boxmoor u/s24 Apr 201514 May 20196
Boxmoor d/s24 Apr 201514 May 20195

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

2015–2019

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 282 measured fish were spread across different length ranges.

Smallest
6.3 cm
Lower quarter
9.6 cm
Median
10.8 cm
Upper quarter
12.1 cm
Largest
19.1 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Bulbourne

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

Perch Chub Roach Dace Pike Bleak

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 →