RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the River Glaze

Largest measured ruffe: 12.9 cm

The largest ruffe measured in Environment Agency surveys of the River Glaze was 12.9 cm, recorded at Glgl7.5 on 7 June 2022.

Across 16 measured ruffe, the median measured length was 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 River Glaze.

See ruffe records across England →

Most recent observation6 May 2025Glgl7.5 · 4 fish
Largest measured ruffe
12.9 cm
Median length
7 cm
Fish measured
16
Survey locations
3

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
12.9 cm7 Jun 2022Glgl7.5161182
8.9 cm26 Apr 2010Glgl10121442
8.5 cm14 May 2019Glgl05155665
7.6 cm21 Apr 2009Glgl10117207
7.5 cm6 May 2025Glgl7.5179711
7.4 cm6 May 2025Glgl7.5179711
7.4 cm21 Apr 2009Glgl10117207
7.1 cm6 May 2025Glgl7.5179711
7 cm6 May 2025Glgl7.5179711
7 cm21 Apr 2009Glgl10117207

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
Glgl7.57 Jun 20226 May 20252
Glgl0521 Apr 200914 May 20193
Glgl1021 Apr 200926 Apr 20102

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

2009–2025

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 16 measured fish were spread across different length ranges.

Smallest
5.1 cm
Lower quarter
6.3 cm
Median
7.1 cm
Upper quarter
7.5 cm
Largest
12.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Glaze

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

European eel Perch Gudgeon 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 →