RiverFish

Ruffe · Gymnocephalus cernuus

Ruffe in the River Lee

Largest measured ruffe: 12.6 cm

The largest ruffe measured in Environment Agency surveys of the River Lee was 12.6 cm, recorded at Hartham Common on 23 June 2011.

Across 18 measured ruffe, the median measured length was 10 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 Lee.

See ruffe records across England →

Most recent observation27 July 2022Amwell Loop · 1 fish
Largest measured ruffe
12.6 cm
Median length
10 cm
Fish measured
18
Survey locations
5

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
12.6 cm23 Jun 2011Hartham Common126756
12.2 cm12 Jul 2016Hartham Common148570
12.2 cm2 Oct 2008Hartham Common115437
11.8 cm2 Oct 2008Hartham Common115437
11.1 cm12 Oct 2010Stonebridge to Tottenham Lock124478
10.4 cm7 Aug 2007Fishers Green106279
10.1 cm12 Jul 2016Hartham Common148570
10 cm23 Jun 2011Hartham Common126756
10 cm24 Jun 2010Hartham Common122497
10 cm22 Aug 2003Hartham Common78509

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
Amwell Loop27 Jul 202227 Jul 20221
Hartham Common22 Aug 200312 Jul 20167
Kings Weir Back Loop29 May 201429 May 20141
Stonebridge to Tottenham Lock12 Oct 201012 Oct 20101
Fishers Green7 Aug 20077 Aug 20071

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

2003–2022

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 18 measured fish were spread across different length ranges.

Smallest
6.3 cm
Lower quarter
9.1 cm
Median
10 cm
Upper quarter
10.9 cm
Largest
12.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Lee

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

Roach Perch Gudgeon Minnow Chub Pike

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 →