RiverFish

Roach · Rutilus rutilus

Roach in the River Ely Ouse

Largest measured roach: 29.8 cm

The largest roach measured in Environment Agency surveys of the River Ely Ouse was 29.8 cm, recorded at Brandon Creek on 14 August 2000.

Across 25,366 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 Ely Ouse.

See roach records across England →

Most recent observation10 October 2023Little Thetford · 1,035 fish
Largest measured roach
29.8 cm
Median length
9.3 cm
Fish measured
25,366
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.

LengthSurvey dateSurvey locationSurvey ID
29.8 cm14 Aug 2000Brandon Creek30845
29.3 cm16 Aug 1993Denver29955
29.3 cm16 Aug 1993Denver29955
29.3 cm12 Aug 1993Brandon Creek29952
28.8 cm2 Sept 1996Wissey Outfall29964
28.3 cm18 Sept 1990Branch Bridge29939
27.8 cm2 Sept 1996Wissey Outfall29964
27.8 cm20 Sept 1990Ely High Bridge29937
27.8 cm18 Sept 1990Branch Bridge29939
27.8 cm5 Sept 1990Ten Mile Bank29943

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
Little Thetford6 Oct 198710 Oct 202317
Sandhill Bridge10 Sept 199019 Sept 202316
Ten Mile Bank5 Sept 19904 Oct 201715
Wissey Outfall4 Sept 199025 Sept 20065
Denver26 Sept 199022 Sept 20068
Brandon Creek27 Sept 199018 Sept 20065
Plantation House13 Sept 199014 Sept 20065
Branch Bridge18 Sept 199012 Sept 20065
Queen Adelaide8 Oct 198711 Sept 20069
Ely High Bridge7 Oct 19878 Sept 20066

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

1987–2023

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 25,366 measured fish were spread across different length ranges.

Smallest
3.1 cm
Lower quarter
7.8 cm
Median
9.3 cm
Upper quarter
11.3 cm
Largest
29.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ely Ouse

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

Perch Common bream Ruffe Pike Zander 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 →