Roach · Rutilus rutilus

Roach in the River Delph

Largest measured roach: 25.3 cm

The largest roach measured in Environment Agency surveys of the River Delph was 25.3 cm, recorded at Earith on 7 August 1997.

Across 6,325 measured roach, 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 roach records across England →

Most recent observation27 June 2023Welmore Lake Sluice · 904 fish

Largest measured roach: 25.3 cm
Median length: 9.3 cm
Fish measured: 6,325
Survey locations: 10

Individual EA measurements

Largest measured roach

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
25.3 cm	7 Aug 1997	Earith	29671
24.3 cm	14 Dec 1988	Sutton Gault Bridge	29655
23.8 cm	7 Aug 1997	Earith	29671
23.8 cm	7 Aug 1997	Earith	29671
23.8 cm	11 Jun 1993	Jolly Bankers Bridge	29663
23.8 cm	14 Dec 1988	Sutton Gault Bridge	29655
23.3 cm	7 Aug 1997	Earith	29671
23.3 cm	7 Aug 1997	Earith	29671
23.3 cm	8 Jun 1993	Earith	29662
23.3 cm	14 Dec 1988	Sutton Gault Bridge	29655

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

Explore the river

Where roach were found

Each point marks a survey location with at least one roach 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 roach
Welmore Lake Sluice	9 Jan 1989	27 Jun 2023	8
Earith Sluice Pools	29 Apr 2013	29 Apr 2013	1
Earith	13 Dec 1988	30 Nov 2011	5
Sutton Gault Bridge	14 Dec 1988	15 Jun 2011	5
Welches Dam	3 Jan 1989	11 Jun 2009	5
Welney Bridge	6 Jan 1989	11 Oct 2005	5
Jolly Bankers Bridge	16 Dec 1988	29 Jul 1997	3
DS Welney Bridge	4 Jan 1989	23 Jul 1997	3
Old Hundred Farm	10 Jan 1989	22 Jul 1997	3
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 roach that year.

488

589

090

091

092

993

094

095

096

897

098

099

000

001

002

503

004

205

006

007

008

209

010

311

012

113

014

015

016

017

018

019

020

021

022

123

Fish measured by surveyors

Measured length distribution

See how the 6,325 measured fish were spread across different length ranges.

Smallest: 3.3 cm
Lower quarter: 7.8 cm
Median: 9.3 cm
Upper quarter: 11.8 cm
Largest: 25.3 cm

0–99 mm

3708

100–199 mm

2534

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 Pike Rudd 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 →