Rudd · Scardinius erythrophthalmus

Rudd in the River Delph

Largest measured rudd: 21.3 cm

The largest rudd measured in Environment Agency surveys of the River Delph was 21.3 cm, recorded at DS Welney Bridge on 16 June 1993.

Across 810 measured rudd, 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 Delph.

See rudd records across England →

Most recent observation27 June 2023Welmore Lake Sluice · 1 fish

Largest measured rudd: 21.3 cm
Median length: 9.3 cm
Fish measured: 810
Survey locations: 9

Individual EA measurements

Largest measured rudd

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
21.3 cm	16 Jun 1993	DS Welney Bridge	29668
16.3 cm	16 Jun 1993	DS Welney Bridge	29668
16.3 cm	14 Dec 1988	Sutton Gault Bridge	29655
15.8 cm	22 Jul 1997	Old Hundred Farm	29677
15.8 cm	22 Jun 1993	Mepal Bridge	29665
15.8 cm	22 Jun 1993	Mepal Bridge	29665
15.8 cm	11 Jun 1993	Jolly Bankers Bridge	29663
15.3 cm	29 Jun 1993	Welches Dam	29666
15.3 cm	11 Jun 1993	Jolly Bankers Bridge	29663
15.3 cm	9 Jun 1993	Sutton Gault Bridge	29664

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where rudd were found

Each point marks a survey location with at least one rudd 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 rudd
Welmore Lake Sluice	21 Jul 1997	27 Jun 2023	5
Sutton Gault Bridge	14 Dec 1988	15 Jun 2011	6
DS Welney Bridge	16 Jun 1993	1 Jun 2011	3
Welches Dam	29 Jun 1993	23 May 2011	5
Welney Bridge	17 Jun 1993	11 Oct 2005	4
Earith	8 Jun 1993	21 May 2003	2
Jolly Bankers Bridge	11 Jun 1993	29 Jul 1997	2
Old Hundred Farm	25 Jun 1993	22 Jul 1997	2
Mepal Bridge	21 Dec 1988	22 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 rudd that year.

288

089

090

091

092

893

094

095

096

797

098

099

000

001

002

503

004

205

006

007

008

309

010

311

012

013

014

015

016

017

018

019

020

021

022

123

Fish measured by surveyors

Measured length distribution

See how the 810 measured fish were spread across different length ranges.

Smallest: 4.3 cm
Lower quarter: 7 cm
Median: 9.3 cm
Upper quarter: 10.3 cm
Largest: 21.3 cm

0–99 mm

549

100–199 mm

260

200–299 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 Common bream Ruffe 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 →