Roach · Rutilus rutilus

Roach in the River Brent

Largest measured roach: 25.7 cm

The largest roach measured in Environment Agency surveys of the River Brent was 25.7 cm, recorded at Greenford Bridge on 16 March 1999.

Across 1,153 measured roach, the median measured length was 12.5 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 Brent.

See roach records across England →

Most recent observation17 October 2024Greenford Bridge · 9 fish

Largest measured roach: 25.7 cm
Median length: 12.5 cm
Fish measured: 1,153
Survey locations: 7

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
25.7 cm	16 Mar 1999	Greenford Bridge	73322
25.5 cm	18 Oct 1994	Greenford Bridge	103397
24.6 cm	18 Oct 1994	Greenford Bridge	103397
24 cm	16 Mar 1999	Greenford Bridge	73322
24 cm	3 Nov 1994	Boston Manor Park (Brent/GUC)	103476
23 cm	16 Mar 1999	Greenford Bridge	73322
22.7 cm	16 Mar 1999	Greenford Bridge	73322
22.5 cm	18 Oct 1994	Greenford Bridge	103397
22 cm	27 Oct 1994	Elthorpe Park River Brent (GUC)	103483
21.5 cm	18 Oct 1994	Greenford Bridge	103397

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
Greenford Bridge	18 Oct 1994	17 Oct 2024	7
Hanwell Bridge	17 Mar 1999	15 Oct 2024	6
Tokyngton Park	22 Jun 2017	22 Jun 2017	1
Boston Manor Park (Brent/GUC)	3 Nov 1994	3 Nov 1994	1
Elthorpe Park River Brent (GUC)	27 Oct 1994	27 Oct 1994	1
Brent Meadows	19 Oct 1994	19 Oct 1994	1
Queensbury Avenue	13 Oct 1994	13 Oct 1994	1

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

1994–2024

Survey records by year

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

594

095

096

097

098

299

000

001

002

003

004

205

006

007

008

009

110

011

012

013

014

015

216

117

018

019

020

021

122

223

224

Fish measured by surveyors

Measured length distribution

See how the 1,153 measured fish were spread across different length ranges.

Smallest: 2.3 cm
Lower quarter: 9.5 cm
Median: 12.5 cm
Upper quarter: 14.1 cm
Largest: 25.7 cm

0–99 mm

317

100–199 mm

803

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Brent

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

Perch 3-spined stickleback Gudgeon European eel Common carp Dace

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 →