RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Penton Hook - Chertsey

Largest measured gudgeon: 18.6 cm

The largest gudgeon measured in Environment Agency surveys of the River Penton Hook - Chertsey was 18.6 cm, recorded at Penton Hook to Chertsey (Laleham Main) on 8 September 2003.

Across 1,051 measured gudgeon, the median measured length was 10.7 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 Penton Hook - Chertsey.

See gudgeon records across England →

Most recent observation3 August 2022Penton Hook to Chertsey (Laleham Main) · 18 fish
Largest measured gudgeon
18.6 cm
Median length
10.7 cm
Fish measured
1,051
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
18.6 cm8 Sept 2003Penton Hook to Chertsey (Laleham Main)77775
16.7 cm23 Sept 2008Penton Hook to Chertsey (Laleham Main)114669
14.3 cm8 Sept 2003Penton Hook to Chertsey (Laleham Main)77775
14 cm8 Sept 2003Penton Hook to Chertsey (Laleham Main)77775
13.9 cm8 Sept 2003Penton Hook to Chertsey (Laleham Main)77775
13.8 cm6 Sept 2013Penton Hook to Chertsey (Laleham Main)138864
13.6 cm14 Sept 2009Penton Hook to Chertsey (Laleham Main)119047
13.5 cm10 Sept 2015Penton Hook to Chertsey (Laleham Main)146403
13.5 cm8 Sept 2003Penton Hook to Chertsey (Laleham Main)77775
13.3 cm10 Sept 2015Penton Hook to Chertsey (Laleham Main)146403

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
Penton Hook to Chertsey (Laleham Main)1 Sept 19953 Aug 202219
Penton Hook, Weir Stream and Pool1 Sept 19959 Sept 201513
Penton Hook Bypass Channel6 Aug 20086 Aug 20081
Penton Hook Loop Upstream of Laleham Intake8 Sept 200510 Sept 20072

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

1995–2022

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 1,051 measured fish were spread across different length ranges.

Smallest
3.7 cm
Lower quarter
9.8 cm
Median
10.7 cm
Upper quarter
11.4 cm
Largest
18.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Penton Hook - Chertsey

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

Roach Chub European eel Bleak Dace Pike

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 →