Ruffe · Gymnocephalus cernuus

Ruffe in the Relief Channel

Largest measured ruffe: 14.8 cm

The largest ruffe measured in Environment Agency surveys of the Relief Channel was 14.8 cm, recorded at DS Downham Bridge on 30 September 1991.

Across 1,168 measured ruffe, the median measured length was 6.3 cm.

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

See ruffe records across England →

Most recent observation9 August 2017Wiggenhall Bridge · 5 fish

Largest measured ruffe: 14.8 cm
Median length: 6.3 cm
Fish measured: 1,168
Survey locations: 16

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
14.8 cm	30 Sept 1991	DS Downham Bridge	30254
13.8 cm	10 Oct 1991	Wiggenhall Bridge	30261
13.3 cm	30 Sept 1991	DS Downham Bridge	30254
12.8 cm	8 Oct 1991	Magdalen Bridge	30259
12.8 cm	8 Oct 1991	Magdalen Bridge	30259
12.8 cm	7 Sept 1988	Downham Market STW	30244
12.5 cm	15 Sept 2011	Wiggenhall Bridge	127952
12.3 cm	8 Sept 2000	Magdalen Bridge	30823
12.3 cm	21 Aug 2000	Denver Sluice	30816
12.3 cm	13 Sept 1993	Magdalen Bridge	30271

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
Wiggenhall Bridge	3 Oct 1988	9 Aug 2017	7
DS Stow Bridge	8 Sept 1988	8 Aug 2017	9
Denver Sluice	5 Sept 1988	7 Aug 2017	9
DS Denver Residual Sluice (Eel Monitoring)	24 Jul 2012	18 Jun 2014	2
DS Denver Sluice	18 Aug 2008	9 Oct 2008	2
Stow Bridge	8 Sept 1988	19 Aug 2008	6
Gullpit Farm Stow Bridge	19 Aug 2008	19 Aug 2008	1
Black Bank Dyke Sluice	18 Aug 2008	18 Aug 2008	1
Saddlebow Bridge	27 Sept 1988	23 Aug 2005	6
Polver Farm Magdalen	9 Oct 1991	17 Aug 2005	4
Magdalen Bridge	16 Sept 1988	16 Aug 2005	5
Downham Market STW	7 Sept 1988	10 Aug 2005	6
Tail Sluice	15 Oct 1991	26 Sept 2000	4
Downham Bridge	6 Oct 1988	22 Aug 2000	5
DS Downham Bridge	6 Sept 1988	10 Sept 1996	4
Holme Farm Magdalen	30 Sept 1988	10 Sept 1993	3

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

1988–2017

Survey records by year

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

1188

089

090

1291

092

1293

094

095

796

097

098

099

1000

001

002

003

004

405

006

007

708

009

010

311

112

013

414

015

016

317

Fish measured by surveyors

Measured length distribution

See how the 1,168 measured fish were spread across different length ranges.

Smallest: 3.3 cm
Lower quarter: 5.3 cm
Median: 6.3 cm
Upper quarter: 7.3 cm
Largest: 14.8 cm

0–99 mm

1117

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Relief Channel

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

Perch Roach Zander Pike European eel Tench

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 →