Gudgeon · Gobio gobio

Gudgeon in the Cuffley Brook

Largest measured gudgeon: 15 cm

The largest gudgeon measured in Environment Agency surveys of the Cuffley Brook was 15 cm, recorded at Rotenone treatment zone on 27 November 2013.

Across 326 measured gudgeon, the median measured length was 9.7 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Cuffley Brook.

See gudgeon records across England →

Most recent observation11 October 2019Flash Lane · 9 fish

Largest measured gudgeon: 15 cm
Median length: 9.7 cm
Fish measured: 326
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.

Length	Survey date	Survey location	Survey ID
15 cm	27 Nov 2013	Rotenone treatment zone	140267
14.9 cm	6 Dec 2013	Glasgow Stud	140284
14.3 cm	31 May 2013	Upstream Wildwoods	136259
13.7 cm	19 Aug 2014	Glasgow Stud 2	142376
13.1 cm	10 Apr 2015	Flash Lane	144538
12.9 cm	10 Apr 2015	Flash Lane	144538
12.9 cm	1 Apr 2015	Upstream Wildwoods	144501
12.9 cm	27 Nov 2013	Rotenone treatment zone	140267
12.8 cm	25 Mar 2014	Glasgow Stud 2	140549
12.7 cm	1 Apr 2015	Upstream Wildwoods	144501

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 surveyed	First recorded	Last recorded	Visits finding gudgeon
Flash Lane	20 Aug 2014	11 Oct 2019	4
Upstream Wildwoods	31 May 2013	10 Oct 2019	4
Glasgow Stud 2	13 Dec 2013	19 Aug 2014	3
Glasgow Stud	6 Dec 2013	6 Dec 2013	1
Rotenone treatment zone	27 Nov 2013	27 Nov 2013	1

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

2013–2019

Survey records by year

Each bar shows how many survey visits recorded gudgeon that year.

413

314

315

116

017

018

219

Fish measured by surveyors

Measured length distribution

See how the 326 measured fish were spread across different length ranges.

Smallest: 2.3 cm
Lower quarter: 7 cm
Median: 9.7 cm
Upper quarter: 10.9 cm
Largest: 15 cm

0–99 mm

173

100–199 mm

153

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Cuffley Brook

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

3-spined stickleback Minnow Stone loach Roach Topmouth gudgeon

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 →