Roach · Rutilus rutilus

Roach in the Great Brook

Largest measured roach: 24.5 cm

The largest roach measured in Environment Agency surveys of the Great Brook was 24.5 cm, recorded at Isle of White Bridge on 4 August 2005.

Across 232 measured roach, the median measured length was 8.8 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Great Brook.

See roach records across England →

Most recent observation13 September 2023Shifford · 26 fish

Largest measured roach: 24.5 cm
Median length: 8.8 cm
Fish measured: 232
Survey locations: 4

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
24.5 cm	4 Aug 2005	Isle of White Bridge	85318
23.4 cm	22 Jun 2007	Flight Pond	105663
21.5 cm	22 Jun 2007	Flight Pond	105663
21.4 cm	22 Jun 2007	Flight Pond	105663
20.9 cm	4 Aug 2005	Isle of White Bridge	85318
20.5 cm	22 Jun 2007	Flight Pond	105663
20.1 cm	22 Jun 2007	Flight Pond	105663
19.8 cm	22 Jun 2007	Flight Pond	105663
19.3 cm	13 Sept 2023	Shifford	163248
19 cm	4 Aug 2005	Isle of White Bridge	85318

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
Shifford	4 Aug 2005	13 Sept 2023	4
Isle of White Bridge	4 Aug 2005	22 Aug 2017	3
Radcot Cut at Marsh Lane	27 Oct 2015	27 Oct 2015	1
Flight Pond	22 Jun 2007	22 Jun 2007	1

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

2005–2023

Survey records by year

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

205

006

107

008

009

010

011

212

013

014

115

016

217

018

019

020

021

022

123

Fish measured by surveyors

Measured length distribution

See how the 232 measured fish were spread across different length ranges.

Smallest: 4 cm
Lower quarter: 5.7 cm
Median: 8.8 cm
Upper quarter: 12.5 cm
Largest: 24.5 cm

0–99 mm

134

100–199 mm

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Great Brook

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

Chub Gudgeon Perch Pike 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 →