RiverFish

Bleak · Alburnus alburnus

Bleak in the River Cliveden

Largest measured bleak: 11.8 cm

The largest bleak measured in Environment Agency surveys of the River Cliveden was 11.8 cm, recorded at Cliveden Downstream Fry on 1 September 2023.

Across 411 measured bleak, the median measured length was 2.7 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 Cliveden.

See bleak records across England →

Most recent observation4 September 2025Cliveden Downstream Fry · 4 fish
Largest measured bleak
11.8 cm
Median length
2.7 cm
Fish measured
411
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
11.8 cm1 Sept 2023Cliveden Downstream Fry164328
10.8 cm23 Aug 2011Cliveden Upstream Fry130059
10.4 cm1 Sept 2023Cliveden Downstream Fry164328
10 cm22 Aug 2012Cliveden Downstream Fry135298
7.4 cm22 Aug 2012Cliveden Downstream Fry135298
6.8 cm19 Aug 2009Cliveden Downstream Fry120437
5.3 cm24 Aug 2017Cliveden Upstream Fry151483
4.4 cm24 Aug 2017Cliveden Upstream Fry151483
4.4 cm19 Aug 2009Cliveden Downstream Fry120437
4.4 cm31 Aug 2006Cliveden Downstream Fry111829

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
Cliveden Downstream Fry7 Sept 20044 Sept 202512
Cliveden Upstream Fry7 Sept 20041 Sept 20238

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 411 measured fish were spread across different length ranges.

Smallest
1.6 cm
Lower quarter
2.4 cm
Median
2.7 cm
Upper quarter
3.1 cm
Largest
11.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Cliveden

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

Minnow Chub Gudgeon Roach Dace 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 →