Roach · Rutilus rutilus

Roach in the Bourn/Black Brook

Largest measured roach: 31 cm

The largest roach measured in Environment Agency surveys of the Bourn/Black Brook was 31 cm, recorded at Thickbroom on 15 June 1999.

Across 834 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 Bourn/Black Brook.

See roach records across England →

Most recent observation15 April 2025Shenstone Site One · 1 fish

Largest measured roach: 31 cm
Median length: 12.5 cm
Fish measured: 834
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
31 cm	15 Jun 1999	Thickbroom	83286
29.7 cm	15 Jun 1999	Thickbroom	83286
29.4 cm	4 Nov 1992	Lodge Farm	4883
29.3 cm	15 Jun 1999	Thickbroom	83286
28.8 cm	15 Jun 1999	Thickbroom	83286
28.6 cm	15 Jun 1999	Thickbroom	83286
28 cm	15 Jun 1999	Thickbroom	83286
27.7 cm	23 Jul 1996	Thickbroom	5130
27.1 cm	15 Jun 1999	Thickbroom	83286
26.9 cm	23 Jul 1996	Thickbroom	5130

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
Shenstone Site One	21 Sept 2004	15 Apr 2025	4
Fazeley	9 Jul 2013	6 Jul 2015	3
Thickbroom	23 Mar 1993	30 Apr 2013	5
Hints	7 May 1991	23 Apr 2013	6
Lodge Farm	1 May 1991	22 Sept 2004	6
Shenstone, Lammas Land	14 Jan 2003	14 Jan 2003	1
Shenstone Site Two	16 Jul 1996	16 Jul 1996	1

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

1991–2025

Survey records by year

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

291

192

393

094

095

496

097

098

399

000

001

002

103

404

005

006

007

008

009

110

011

012

413

014

115

016

017

018

119

020

021

022

023

024

125

Fish measured by surveyors

Measured length distribution

See how the 834 measured fish were spread across different length ranges.

Smallest: 4.7 cm
Lower quarter: 10.2 cm
Median: 12.5 cm
Upper quarter: 15.5 cm
Largest: 31 cm

0–99 mm

180

100–199 mm

596

200–299 mm

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Bourn/Black Brook

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

Dace Brown / sea trout Bullhead Stone loach 3-spined stickleback 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 →