RiverFish

Bleak · Alburnus alburnus

Bleak in the River Staines

Largest measured bleak: 9.7 cm

The largest bleak measured in Environment Agency surveys of the River Staines was 9.7 cm, recorded at Staines Downstream Fry on 25 August 2016.

Across 1,123 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 Staines.

See bleak records across England →

Most recent observation3 September 2025Staines Upstream Fry · 6 fish
Largest measured bleak
9.7 cm
Median length
3.2 cm
Fish measured
1,123
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
9.7 cm25 Aug 2016Staines Downstream Fry149237
9.6 cm25 Aug 2016Staines Downstream Fry149237
9.1 cm25 Aug 2016Staines Downstream Fry149237
8.8 cm22 Aug 2007Staines Downstream Fry108628
8.1 cm25 Aug 2016Staines Downstream Fry149237
7.6 cm25 Aug 2016Staines Downstream Fry149237
6 cm3 Sept 2025Staines Downstream Fry178529
5.5 cm21 Aug 2018Staines Upstream Fry153455
5.4 cm30 Aug 2023Staines Downstream Fry164355
5.3 cm21 Aug 2018Staines Upstream Fry153455

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
Staines Upstream Fry9 Sept 20043 Sept 202514
Staines Downstream Fry9 Sept 20043 Sept 202510

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 1,123 measured fish were spread across different length ranges.

Smallest
1.4 cm
Lower quarter
2.8 cm
Median
3.2 cm
Upper quarter
3.7 cm
Largest
9.7 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Staines

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

Dace Gudgeon Roach Chub 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 →