RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the Frith Bank Drain

Largest measured ruffe: 12.5 cm

The largest ruffe measured in Environment Agency surveys of the Frith Bank Drain was 12.5 cm, recorded at Cowbridge on 2 July 2013.

Across 210 measured ruffe, the median measured length was 7.3 cm.

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

See ruffe records across England →

Most recent observation5 July 2016Cowbridge · 2 fish
Largest measured ruffe
12.5 cm
Median length
7.3 cm
Fish measured
210
Survey locations
2

Individual EA measurements

Largest measured ruffe

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

LengthSurvey dateSurvey locationSurvey ID
12.5 cm2 Jul 2013Cowbridge138613
11.6 cm7 Nov 1990Downstream Antons Gowt Lock58266
11.3 cm7 Nov 1990Downstream Antons Gowt Lock58266
10.8 cm17 Jul 2001Downstream Antons Gowt Lock59057
10.6 cm5 Jul 2016Cowbridge148631
10.5 cm6 Jun 1996Downstream Antons Gowt Lock58302
10.3 cm7 Jun 1996Cowbridge58301
10.3 cm7 Nov 1990Downstream Antons Gowt Lock58266
10.3 cm7 Nov 1990Downstream Antons Gowt Lock58266
10.3 cm7 Nov 1990Downstream Antons Gowt Lock58266

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

Explore the river

Where ruffe were found

Each point marks a survey location with at least one ruffe 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 ruffe
Cowbridge7 Jun 19935 Jul 20166
Downstream Antons Gowt Lock7 Nov 19904 Jul 20136

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

1990–2016

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 210 measured fish were spread across different length ranges.

Smallest
5.4 cm
Lower quarter
6.8 cm
Median
7.3 cm
Upper quarter
8 cm
Largest
12.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Frith Bank Drain

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

Perch Pike Roach Common bream European eel Silver bream

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 →