Ruffe · Gymnocephalus cernuus

Ruffe in the River Delph

Largest measured ruffe: 14.8 cm

The largest ruffe measured in Environment Agency surveys of the River Delph was 14.8 cm, recorded at Jolly Bankers Bridge on 11 June 1993.

Across 289 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 Delph.

See ruffe records across England →

Most recent observation27 June 2023Welmore Lake Sluice · 7 fish

Largest measured ruffe: 14.8 cm
Median length: 8.3 cm
Fish measured: 289
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
14.8 cm	11 Jun 1993	Jolly Bankers Bridge	29663
14.8 cm	11 Jun 1993	Jolly Bankers Bridge	29663
13.8 cm	6 Jan 1989	Welney Bridge	29658
13.3 cm	18 Jun 1993	Welmore Lake Sluice	29670
13.3 cm	18 Jun 1993	Welmore Lake Sluice	29670
13.3 cm	11 Jun 1993	Jolly Bankers Bridge	29663
13.3 cm	11 Jun 1993	Jolly Bankers Bridge	29663
13.3 cm	11 Jun 1993	Jolly Bankers Bridge	29663
13.3 cm	11 Jun 1993	Jolly Bankers Bridge	29663
12.3 cm	11 Jun 1993	Jolly Bankers Bridge	29663

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
Welmore Lake Sluice	9 Jan 1989	27 Jun 2023	8
Earith Sluice Pools	29 Apr 2013	29 Apr 2013	1
Earith	8 Jun 1993	30 Nov 2011	3
Welney Bridge	6 Jan 1989	12 Jun 2009	3
Welches Dam	3 Jan 1989	11 Jun 2009	4
Sutton Gault Bridge	22 May 2003	9 Jun 2009	2
DS Welney Bridge	4 Jan 1989	23 Jul 1997	3
Old Hundred Farm	10 Jan 1989	22 Jul 1997	2
Jolly Bankers Bridge	16 Dec 1988	11 Jun 1993	2

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

1988–2023

Survey records by year

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

188

589

090

091

092

693

094

095

096

397

098

099

000

001

002

303

004

105

006

007

008

509

010

211

012

113

014

015

016

017

018

019

020

021

022

123

Fish measured by surveyors

Measured length distribution

See how the 289 measured fish were spread across different length ranges.

Smallest: 3.8 cm
Lower quarter: 7 cm
Median: 8.3 cm
Upper quarter: 9.8 cm
Largest: 14.8 cm

0–99 mm

231

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Delph

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

Perch Roach Pike Rudd Common bream 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 →