Ruffe · Gymnocephalus cernuus

Ruffe in the River Wharfe

Largest measured ruffe: 13.2 cm

The largest ruffe measured in Environment Agency surveys of the River Wharfe was 13.2 cm, recorded at U/s Boston Spa Weir on 16 September 1998.

Across 135 measured ruffe, the median measured length was 8.8 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 Wharfe.

See ruffe records across England →

Most recent observation20 August 2024Tadcaster post 2006 · 2 fish

Largest measured ruffe: 13.2 cm
Median length: 8.8 cm
Fish measured: 135
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
13.2 cm	16 Sept 1998	U/s Boston Spa Weir	110303
12.9 cm	19 Jul 2004	Ulleskelf	81674
12.9 cm	13 Aug 1998	Collingham	110185
12.8 cm	16 Sept 1998	U/s Boston Spa Weir	110303
12.4 cm	4 Aug 1999	Wetherby Grange	110653
12.3 cm	16 Sept 1998	U/s Boston Spa Weir	110303
12.1 cm	16 Sept 1998	U/s Boston Spa Weir	110303
12 cm	13 Aug 1998	Wetherby Grange	110192
11.9 cm	25 Jul 1997	Collingham	110045
11.7 cm	4 Aug 1999	Wetherby Grange	110653

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
Tadcaster post 2006	20 Aug 2024	20 Aug 2024	1
Boston Spa - Fry Survey	23 Sept 1986	29 Sept 2005	8
Wetherby Grange	12 Aug 1997	28 Jun 2005	7
Tadcaster pre 2006	23 Jul 1997	22 Jul 2004	4
Ulleskelf	2 Aug 1999	19 Jul 2004	2
Boston Spa	19 Jul 1996	18 Jul 2000	4
U/s Boston Spa Weir	16 Sept 1996	16 Sept 1998	3
Collingham	26 Jul 1996	13 Aug 1998	3

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

1986–2024

Survey records by year

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

186

187

188

089

090

191

192

093

194

095

396

597

598

399

100

201

002

103

304

205

006

007

008

009

010

011

012

013

014

015

016

017

018

019

020

021

022

023

124

Fish measured by surveyors

Measured length distribution

See how the 135 measured fish were spread across different length ranges.

Smallest: 3.3 cm
Lower quarter: 8.1 cm
Median: 8.8 cm
Upper quarter: 10.2 cm
Largest: 13.2 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Wharfe

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

Minnow Bullhead Stone loach Brown / sea trout European eel Chub

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 →