RiverFish

Bleak · Alburnus alburnus

Bleak in the River Shepperton - Sunbury

Largest measured bleak: 18.2 cm

The largest bleak measured in Environment Agency surveys of the River Shepperton - Sunbury was 18.2 cm, recorded at Shepperton Weirs 1 and 2 on 8 September 2016.

Across 1,700 measured bleak, the median measured length was 9 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 Shepperton - Sunbury.

See bleak records across England →

Most recent observation22 July 2024Desborough Cut · 113 fish
Largest measured bleak
18.2 cm
Median length
9 cm
Fish measured
1,700
Survey locations
5

Individual EA measurements

Largest measured bleak

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

LengthSurvey dateSurvey locationSurvey ID
18.2 cm8 Sept 2016Shepperton Weirs 1 and 2149689
15.6 cm10 Sept 2012Desborough Loop133521
15.5 cm8 Sept 2016Desborough Cut149687
15.3 cm8 Sept 2016Shepperton Weirs 1 and 2149689
14.7 cm9 Sept 2013Shepperton Weirs 1 and 2138594
14.7 cm13 Sept 2006Shepperton Weirs 1 and 2101398
14.6 cm22 Jul 2024Desborough Cut168523
14.4 cm10 Sept 2012Desborough Loop133521
14.3 cm8 Sept 2016Desborough Cut149687
14.3 cm12 Sept 2007Shepperton Weir stream106771

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where bleak were found

Each point marks a survey location with at least one bleak 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 bleak
Shepperton Weirs 1 and 21 Sept 199522 Jul 202420
Desborough Cut1 Sept 199522 Jul 202420
Desborough Loop12 Sept 20059 Sept 20136
Shepperton Weir stream1 Sept 199513 Sept 20113
Shepperton main Channel1 Sept 199512 Sept 20053

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

1995–2024

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 1,700 measured fish were spread across different length ranges.

Smallest
4.2 cm
Lower quarter
8.1 cm
Median
9 cm
Upper quarter
10.4 cm
Largest
18.2 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Shepperton - Sunbury

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

Roach Dace Perch Pike Chub European eel

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 →