RiverFish

Topmouth gudgeon · Pseudorasbora parva

Topmouth gudgeon in the Cuffley Brook

Largest measured topmouth gudgeon: 7.9 cm

The largest topmouth gudgeon measured in Environment Agency surveys of the Cuffley Brook was 7.9 cm, recorded at Rotenone treatment zone on 27 November 2013.

Across 19 measured topmouth gudgeon, the median measured length was 5.9 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 topmouth gudgeon records across England →

Most recent observation26 March 2014Flash Lane · 1 fish
Largest measured topmouth gudgeon
7.9 cm
Median length
5.9 cm
Fish measured
19
Survey locations
5

Individual EA measurements

Largest measured topmouth gudgeon

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
7.9 cm27 Nov 2013Rotenone treatment zone140267
7.3 cm31 May 2013Upstream Wildwoods136259
7.1 cm27 Nov 2013Rotenone treatment zone140267
7.1 cm27 Nov 2013Rotenone treatment zone140267
6.9 cm27 Nov 2013Rotenone treatment zone140267
6.8 cm27 Nov 2013Rotenone treatment zone140267
6.7 cm6 Dec 2013Glasgow Stud140284
6.2 cm27 Nov 2013Rotenone treatment zone140267
6.2 cm27 Nov 2013Rotenone treatment zone140267
5.9 cm27 Nov 2013Rotenone treatment zone140267

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where topmouth gudgeon were found

Each point marks a survey location with at least one topmouth 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 topmouth gudgeon
Flash Lane26 Mar 201426 Mar 20141
Glasgow Stud 213 Dec 201325 Mar 20142
Glasgow Stud6 Dec 20136 Dec 20131
Rotenone treatment zone27 Nov 201327 Nov 20131
Upstream Wildwoods31 May 201331 May 20131

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

2013–2014

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 19 measured fish were spread across different length ranges.

Smallest
3.9 cm
Lower quarter
5.4 cm
Median
5.9 cm
Upper quarter
6.9 cm
Largest
7.9 cm

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 Gudgeon Roach

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 →