RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Onny

Largest measured gudgeon: 13.7 cm

The largest gudgeon measured in Environment Agency surveys of the River Onny was 13.7 cm, recorded at Upstream Plowden Mill on 20 August 2025.

Across 43 measured gudgeon, the median measured length was 10.5 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 Onny.

See gudgeon records across England →

Most recent observation10 September 2025Craven Arms (DS Halford Weir) · 2 fish
Largest measured gudgeon
13.7 cm
Median length
10.5 cm
Fish measured
43
Survey locations
4

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
13.7 cm20 Aug 2025Upstream Plowden Mill178017
13.7 cm4 Aug 2021Craven Arms (DS Halford Weir)160048
13.3 cm14 Aug 2023Craven Arms (DS Halford Weir)162920
13.1 cm14 Aug 2023Craven Arms (DS Halford Weir)162920
13 cm14 Aug 2023Craven Arms (DS Halford Weir)162920
12.5 cm10 Sept 2025Craven Arms (DS Halford Weir)178651
12.5 cm14 Aug 2023Craven Arms (DS Halford Weir)162920
12.4 cm14 Aug 2023Craven Arms (DS Halford Weir)162920
11.9 cm4 Aug 2021Craven Arms (DS Halford Weir)160048
11.6 cm14 Aug 2023Craven Arms (DS Halford Weir)162920

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
Craven Arms (DS Halford Weir)4 Aug 202110 Sept 20254
Upstream Plowden Mill20 Aug 202520 Aug 20251
Bow House17 Jun 201417 Jun 20141
Bromfield25 Sept 199125 Sept 19911

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

1991–2025

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 43 measured fish were spread across different length ranges.

Smallest
7.3 cm
Lower quarter
9.6 cm
Median
10.5 cm
Upper quarter
11.6 cm
Largest
13.7 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Onny

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

Bullhead Stone loach Minnow Brown / sea trout Atlantic salmon European eel

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 →