RiverFish

Bleak · Alburnus alburnus

Bleak in the River Laleham Abbey

Largest measured bleak: 14.3 cm

The largest bleak measured in Environment Agency surveys of the River Laleham Abbey was 14.3 cm, recorded at Laleham Abbey Upstream Fry on 22 August 2007.

Across 819 measured bleak, the median measured length was 3.2 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 Laleham Abbey.

See bleak records across England →

Most recent observation3 September 2025Laleham Abbey Upstream Fry · 9 fish
Largest measured bleak
14.3 cm
Median length
3.2 cm
Fish measured
819
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
14.3 cm22 Aug 2007Laleham Abbey Upstream Fry108629
12 cm22 Aug 2007Laleham Abbey Downstream Fry108632
11.9 cm22 Aug 2007Laleham Abbey Downstream Fry108632
11.2 cm22 Aug 2012Laleham Abbey Upstream Fry135275
9.1 cm22 Aug 2007Laleham Abbey Downstream Fry108632
8.8 cm22 Aug 2007Laleham Abbey Downstream Fry108632
8.8 cm9 Sept 2004Laleham Abbey Upstream Fry111743
8.6 cm22 Aug 2007Laleham Abbey Downstream Fry108632
8.4 cm22 Aug 2007Laleham Abbey Downstream Fry108632
8.2 cm22 Aug 2007Laleham Abbey Downstream Fry108632

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
Laleham Abbey Upstream Fry27 Aug 20033 Sept 202518
Laleham Abbey Downstream Fry27 Aug 20033 Sept 202513

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

2003–2025

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 819 measured fish were spread across different length ranges.

Smallest
0.8 cm
Lower quarter
2.5 cm
Median
3.2 cm
Upper quarter
3.7 cm
Largest
14.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Laleham Abbey

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

Gudgeon Roach Chub Dace Perch Minnow

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 →