RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Marlow - Cookham

Largest measured gudgeon: 13.3 cm

The largest gudgeon measured in Environment Agency surveys of the River Marlow - Cookham was 13.3 cm, recorded at Marlow - Cookham Upper Main Channel on 6 September 2004.

Across 296 measured gudgeon, the median measured length was 10 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 Marlow - Cookham.

See gudgeon records across England →

Most recent observation28 July 2023Marlow - Cookham Upper Main Channel · 1 fish
Largest measured gudgeon
13.3 cm
Median length
10 cm
Fish measured
296
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
13.3 cm6 Sept 2004Marlow - Cookham Upper Main Channel82341
12.9 cm6 Sept 2004Marlow - Cookham Upper Main Channel82341
12.7 cm31 Aug 2005Marlow - Cookham Upper Main Channel86261
12.5 cm6 Sept 2004Marlow - Cookham Upper Main Channel82341
12.5 cm1 Sept 2000Marlow - Cookham Upper Main Channel121556
12.4 cm5 Sept 2011Marlow - Cookham Upper Main Channel128117
12.4 cm1 Sept 2008Marlow - Cookham Upper Main Channel114247
12.3 cm7 Sept 2009Marlow - Cookham Upper Main Channel118990
12.2 cm6 Sept 2004Marlow - Cookham Upper Main Channel82341
12.2 cm6 Sept 2004Marlow - Cookham Upper Main Channel82341

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
Marlow - Cookham Upper Main Channel1 Sept 199528 Jul 202321
Cookham Lock Cut7 Sept 20097 Sept 20091
Marlow Sewage Treatment Outfall1 Sept 199831 Aug 20053
Marlow Weir Pool1 Sept 19951 Sept 19951

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

1995–2023

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 296 measured fish were spread across different length ranges.

Smallest
3.3 cm
Lower quarter
9.3 cm
Median
10 cm
Upper quarter
10.7 cm
Largest
13.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Marlow - Cookham

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

Bleak Perch Pike Roach Chub Dace

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 →