RiverFish

Gudgeon · Gobio gobio

Gudgeon in the Turkey Brook

Largest measured gudgeon: 14.7 cm

The largest gudgeon measured in Environment Agency surveys of the Turkey Brook was 14.7 cm, recorded at d/s Cuffley Brook confluence on 5 October 2015.

Across 272 measured gudgeon, the median measured length was 8.7 cm.

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

See gudgeon records across England →

Most recent observation30 June 2026Forty Hall · 84 fish
Largest measured gudgeon
14.7 cm
Median length
8.7 cm
Fish measured
272
Survey locations
7

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
14.7 cm5 Oct 2015d/s Cuffley Brook confluence146868
14.6 cm5 Oct 2015d/s Cuffley Brook confluence146868
14.5 cm5 Oct 2015d/s Cuffley Brook confluence146868
14.4 cm27 Aug 2014d/s Cuffley Brook confluence142459
13.4 cm4 Apr 2014Albany Park140631
13.3 cm8 Apr 2015Forty Hall144536
13.2 cm5 Oct 2015d/s Cuffley Brook confluence146868
13.2 cm8 Apr 2015Forty Hall144536
13.2 cm27 Aug 2014d/s Cuffley Brook confluence142459
13.2 cm16 Apr 2014Forty Hall140665

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
Forty Hall4 May 200630 Jun 20268
Whitewebbs Golf Course13 Dec 201321 Oct 20193
Upstream Albany Park9 Oct 20179 Oct 20171
Albany Park4 Dec 20139 Oct 20174
d/s Cuffley Brook confluence3 Dec 20135 Oct 20155
Rotenone neutralisation zone27 Nov 201327 Nov 20131
Forty Hall TMG26 Mar 200926 Mar 20091

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

2006–2026

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 272 measured fish were spread across different length ranges.

Smallest
3.1 cm
Lower quarter
6.4 cm
Median
8.7 cm
Upper quarter
10.9 cm
Largest
14.7 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Turkey Brook

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

Minnow Stone loach Roach 3-spined stickleback Bullhead 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 →