Ruffe · Gymnocephalus cernuus

Ruffe in the River Flood Relief

Largest measured ruffe: 13 cm

The largest ruffe measured in Environment Agency surveys of the River Flood Relief was 13 cm, recorded at Kiora Sluice on 2 June 1992.

Across 22 measured ruffe, the median measured length was 10.3 cm.

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

See ruffe records across England →

Most recent observation14 April 2009Rammey Marsh Sluice - David Stoker · 1 fish

Largest measured ruffe: 13 cm
Median length: 10.3 cm
Fish measured: 22
Survey locations: 4

Individual EA measurements

Largest measured ruffe

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

Length	Survey date	Survey location	Survey ID
13 cm	2 Jun 1992	Kiora Sluice	115810
12 cm	2 Jun 1992	Kiora Sluice	115810
12 cm	2 Jun 1992	Kiora Sluice	115810
12 cm	2 Jun 1992	Kiora Sluice	115810
11.9 cm	2 Jun 1992	Kiora Sluice	115810
11.5 cm	6 Jun 1992	Fields Weir	115813
11.5 cm	2 Jun 1992	Kiora Sluice	115810
11.5 cm	2 Jun 1992	Kiora Sluice	115810
11 cm	6 Jun 1992	Fields Weir	115813
11 cm	6 Jun 1992	Fields Weir	115813

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 surveyed	First recorded	Last recorded	Visits finding ruffe
Rammey Marsh Sluice - David Stoker	14 Apr 2009	14 Apr 2009	1
Fields Weir	6 Jun 1992	6 Jun 1992	1
Kiora Sluice	2 Jun 1992	2 Jun 1992	1
Nazeing New Road	28 May 1992	28 May 1992	1

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

1992–2009

Survey records by year

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

392

093

094

095

096

097

098

099

000

001

002

003

004

005

006

007

008

109

Fish measured by surveyors

Measured length distribution

See how the 22 measured fish were spread across different length ranges.

Smallest: 7 cm
Lower quarter: 9 cm
Median: 10.3 cm
Upper quarter: 11.5 cm
Largest: 13 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Flood Relief

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

Roach European eel Pike Tench Perch Barbel

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 →