Ruffe · Gymnocephalus cernuus

Ruffe in the River Ely Ouse

Largest measured ruffe: 14.5 cm

The largest ruffe measured in Environment Agency surveys of the River Ely Ouse was 14.5 cm, recorded at Ten Mile Bank on 8 September 2005.

Across 1,952 measured ruffe, the median measured length was 8.3 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 Ely Ouse.

See ruffe records across England →

Most recent observation10 October 2023Little Thetford · 67 fish

Largest measured ruffe: 14.5 cm
Median length: 8.3 cm
Fish measured: 1,952
Survey locations: 10

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
14.5 cm	8 Sept 2005	Ten Mile Bank	86046
13.7 cm	19 Sept 2023	Sandhill Bridge	163306
12.3 cm	12 Aug 1993	Brandon Creek	29952
12.2 cm	10 Oct 2023	Little Thetford	163574
11.9 cm	2 Oct 2017	Little Thetford	151805
11.8 cm	10 Oct 2023	Little Thetford	163574
11.8 cm	19 Sept 2023	Sandhill Bridge	163306
11.8 cm	12 Aug 1996	Little Thetford	29956
11.8 cm	12 Aug 1993	Plantation House	29951
11.7 cm	2 Oct 2017	Little Thetford	151805

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
Little Thetford	19 Sept 1990	10 Oct 2023	14
Sandhill Bridge	10 Sept 1990	19 Sept 2023	15
Ten Mile Bank	5 Sept 1990	4 Oct 2017	13
Wissey Outfall	4 Sept 1990	25 Sept 2006	4
Denver	26 Sept 1990	22 Sept 2006	7
Brandon Creek	27 Sept 1990	18 Sept 2006	5
Plantation House	13 Sept 1990	14 Sept 2006	5
Branch Bridge	18 Sept 1990	12 Sept 2006	5
Queen Adelaide	8 Oct 1987	11 Sept 2006	9
Ely High Bridge	7 Oct 1987	8 Sept 2006	6

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.

287

088

089

1090

091

092

1093

094

095

1096

097

098

099

900

001

002

503

504

405

1006

207

108

209

310

311

012

013

014

215

016

317

018

019

020

021

022

223

Fish measured by surveyors

Measured length distribution

See how the 1,952 measured fish were spread across different length ranges.

Smallest: 3.3 cm
Lower quarter: 6.1 cm
Median: 8.3 cm
Upper quarter: 9.3 cm
Largest: 14.5 cm

0–99 mm

1789

100–199 mm

163

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ely Ouse

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

Perch Roach Common bream Pike Zander Silver bream

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 →