RiverFish

Roach · Rutilus rutilus

Roach in the River Great Ouse

Largest measured roach: 20 cm

The largest roach measured in Environment Agency surveys of the River Great Ouse was 20 cm, recorded at DS Brownshill Staunch on 16 April 2026.

Across 14 measured roach, the median measured length was 7.3 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 Great Ouse.

See roach records across England →

Most recent observation16 April 2026DS Brownshill Staunch · 1 fish
Largest measured roach
20 cm
Median length
7.3 cm
Fish measured
14
Survey locations
6

Individual EA measurements

Largest measured roach

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
20 cm16 Apr 2026DS Brownshill Staunch180999
9.6 cm24 Oct 2012US A.G. Wright Sluice134395
8.3 cm24 Oct 2012US A.G. Wright Sluice134395
8.2 cm24 Oct 2012US A.G. Wright Sluice134395
8.2 cm24 Oct 2012US A.G. Wright Sluice134395
7.7 cm24 Oct 2012US A.G. Wright Sluice134395
7.3 cm24 Oct 2012US A.G. Wright Sluice134395
7.3 cm24 Oct 2012US A.G. Wright Sluice134395
6.8 cm24 Oct 2012US A.G. Wright Sluice134395
6.4 cm24 Oct 2012US A.G. Wright Sluice134395

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 surveyedFirst recordedLast recordedVisits finding roach
DS Brownshill Staunch11 Mar 202516 Apr 20262
US A.G. Wright Sluice26 Nov 200824 Oct 20128
US Denver Little Eye Sluice26 Nov 200819 Nov 20105
US Brownshill Staunch26 Nov 20082 Dec 20092
DS Holywell17 Jul 200817 Jul 20081
DS Brownshill Staunch17 Jul 200817 Jul 20081

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

2008–2026

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 14 measured fish were spread across different length ranges.

Smallest
5 cm
Lower quarter
5.7 cm
Median
7.3 cm
Upper quarter
8.2 cm
Largest
20 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Great Ouse

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

Perch European eel Ruffe Pike Gudgeon

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 →