Ruffe · Gymnocephalus cernuus

Ruffe in the River Ivel

Largest measured ruffe: 14.3 cm

The largest ruffe measured in Environment Agency surveys of the River Ivel was 14.3 cm, recorded at Beeston on 5 July 1989.

Across 204 measured ruffe, the median measured length was 7.8 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 Ivel.

See ruffe records across England →

Most recent observation30 April 2025Girtford Weir · 1 fish

Largest measured ruffe: 14.3 cm
Median length: 7.8 cm
Fish measured: 204
Survey locations: 8

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
14.3 cm	5 Jul 1989	Beeston	29250
12.8 cm	20 Jan 1992	Gt Ouse Confluence	29263
12.3 cm	16 May 2016	DS Iron Bridge	148035
12.3 cm	7 Jul 1989	Girtford Weir	29251
11.8 cm	16 Jan 1992	Broom Mill	29257
11.5 cm	13 May 2005	High Romper Bridge	84563
11.5 cm	8 Jul 2003	Girtford Weir	76474
11.4 cm	30 Apr 2025	Girtford Weir	176390
11.3 cm	27 Jan 1992	Sandy	29261
11 cm	13 May 2005	High Romper Bridge	84563

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
Girtford Weir	7 Jul 1989	30 Apr 2025	8
DS Iron Bridge	7 Jan 1992	16 May 2016	2
High Romper Bridge	23 Jun 1989	13 May 2005	5
Gt Ouse Confluence	20 Jan 1992	4 Aug 1998	2
Sandy	27 Jan 1992	29 Jul 1998	3
Girtford Bridge	11 May 1995	11 May 1995	1
Beeston	5 Jul 1989	10 May 1995	3
Broom Mill	11 Jul 1989	9 May 1995	3

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

1989–2025

Survey records by year

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

489

090

191

592

093

094

595

096

097

498

099

000

001

002

103

004

105

006

107

108

109

110

011

012

013

014

015

116

017

018

019

020

021

022

023

024

125

Fish measured by surveyors

Measured length distribution

See how the 204 measured fish were spread across different length ranges.

Smallest: 3.8 cm
Lower quarter: 6.8 cm
Median: 7.8 cm
Upper quarter: 9.3 cm
Largest: 14.3 cm

0–99 mm

181

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ivel

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

Chub Pike Roach Gudgeon Dace Bullhead

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 →