RiverFish

Bleak · Alburnus alburnus

Bleak in the River Sunbury - Molesey

Largest measured bleak: 16.6 cm

The largest bleak measured in Environment Agency surveys of the River Sunbury - Molesey was 16.6 cm, recorded at Downstream Walton Intake on 14 September 2006.

Across 786 measured bleak, 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 Sunbury - Molesey.

See bleak records across England →

Most recent observation1 August 2023Sunbury Main Channel · 20 fish
Largest measured bleak
16.6 cm
Median length
9.3 cm
Fish measured
786
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
16.6 cm14 Sept 2006Downstream Walton Intake108711
16.6 cm14 Sept 2006Sunbury Main Channel101390
14.7 cm16 Sept 2009Upstream Walton Intake119027
13.8 cm13 Sept 2007Sunbury Main Channel116669
13.8 cm13 Sept 2007Downstream Walton Intake106766
13.5 cm14 Sept 2006Downstream Walton Intake108711
13.5 cm14 Sept 2006Sunbury Main Channel101390
13.4 cm14 Sept 2006Upstream Walton Intake108713
13.4 cm14 Sept 2006Sunbury Main Channel101390
13.2 cm14 Sept 2006Downstream Walton Intake108711

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
Sunbury Main Channel1 Sept 19951 Aug 20239
Sunbury Weirpool1 Sept 199510 Sept 201313
Downstream Walton Intake13 Sept 200510 Sept 20136
Upstream Walton Intake13 Sept 200511 Sept 20126
Hampton to Molesey13 Sept 200713 Sept 20071

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

1995–2023

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 786 measured fish were spread across different length ranges.

Smallest
3.4 cm
Lower quarter
6.6 cm
Median
9.3 cm
Upper quarter
10.5 cm
Largest
16.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Sunbury - Molesey

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

Dace Roach Perch Pike European eel 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 →