RiverFish

Bleak · Alburnus alburnus

Bleak in the River Boveney

Largest measured bleak: 15.1 cm

The largest bleak measured in Environment Agency surveys of the River Boveney was 15.1 cm, recorded at Boveney Downstream Fry on 20 August 2008.

Across 992 measured bleak, the median measured length was 3.5 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 Boveney.

See bleak records across England →

Most recent observation4 September 2025Boveney Downstream Fry · 18 fish
Largest measured bleak
15.1 cm
Median length
3.5 cm
Fish measured
992
Survey locations
2

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
15.1 cm20 Aug 2008Boveney Downstream Fry125629
14.5 cm20 Aug 2008Boveney Downstream Fry125629
14.3 cm20 Aug 2008Boveney Downstream Fry125629
14 cm20 Aug 2008Boveney Downstream Fry125629
13.8 cm20 Aug 2008Boveney Downstream Fry125629
13.7 cm20 Aug 2008Boveney Downstream Fry125629
13.4 cm20 Aug 2008Boveney Downstream Fry125629
13.2 cm20 Aug 2008Boveney Downstream Fry125629
12.9 cm19 Aug 2015Boveney Downstream Fry146046
12.8 cm20 Aug 2008Boveney Downstream Fry125629

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
Boveney Downstream Fry8 Sept 20044 Sept 202515
Boveney Upstream Fry8 Sept 200421 Aug 202413

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

2004–2025

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 992 measured fish were spread across different length ranges.

Smallest
1.6 cm
Lower quarter
2.7 cm
Median
3.5 cm
Upper quarter
4.3 cm
Largest
15.1 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Boveney

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

Gudgeon Chub Dace Roach Minnow Perch

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 →