Ruffe · Gymnocephalus cernuus

Ruffe in the River Nene (Old Course)

Largest measured ruffe: 15.3 cm

The largest ruffe measured in Environment Agency surveys of the River Nene (Old Course) was 15.3 cm, recorded at March on 2 September 1987.

Across 1,211 measured ruffe, the median measured length was 9.3 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 Nene (Old Course).

See ruffe records across England →

Most recent observation5 July 2023Staffurths Bridge · 1 fish

Largest measured ruffe: 15.3 cm
Median length: 9.3 cm
Fish measured: 1,211
Survey locations: 9

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
15.3 cm	2 Sept 1987	March	29686
15.3 cm	27 Aug 1987	Benwick	29683
14.3 cm	2 Sept 1987	March	29686
14.3 cm	27 Aug 1987	Benwick	29683
13.8 cm	29 Jun 1999	Ramsey Mere	29708
13.8 cm	27 Aug 1987	Benwick	29683
13.8 cm	25 Aug 1987	Ramsey Mere	29681
13.3 cm	29 Jun 1999	Ramsey Mere	29708
13.3 cm	24 Jul 1991	March	29695
13.3 cm	10 Sept 1987	Low Corner Farm	29687

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
Staffurths Bridge	1 Sept 1987	5 Jul 2023	5
Benwick	27 Aug 1987	15 Jun 2017	4
March	2 Sept 1987	28 Jun 2006	5
Stokes Bridge	20 Aug 1987	27 Jun 2006	4
Low Corner Farm	10 Sept 1987	6 Jul 1999	4
Ramsey Mere	25 Aug 1987	29 Jun 1999	4
Four Hundred Farm	26 Aug 1987	16 Jun 1999	4
Floods Ferry	28 Aug 1987	13 Jun 1994	3
Saunders Bridge	24 Aug 1987	7 Jun 1994	3

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

1987–2023

Survey records by year

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

987

088

089

090

891

092

093

894

095

096

097

098

699

000

001

002

003

004

005

206

007

008

009

010

011

012

013

014

015

016

217

018

019

020

021

022

123

Fish measured by surveyors

Measured length distribution

See how the 1,211 measured fish were spread across different length ranges.

Smallest: 4.3 cm
Lower quarter: 8.3 cm
Median: 9.3 cm
Upper quarter: 10.3 cm
Largest: 15.3 cm

0–99 mm

781

100–199 mm

430

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Nene (Old Course)

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

Roach Perch Common bream Pike Silver bream Zander

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 →