RiverFish

Bleak · Alburnus alburnus

Bleak in the River Eton College

Largest measured bleak: 14.8 cm

The largest bleak measured in Environment Agency surveys of the River Eton College was 14.8 cm, recorded at Eton Upstream Fry on 21 August 2012.

Across 386 measured bleak, the median measured length was 2.6 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 Eton College.

See bleak records across England →

Most recent observation4 September 2025Eton Upstream Fry · 2 fish
Largest measured bleak
14.8 cm
Median length
2.6 cm
Fish measured
386
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
14.8 cm21 Aug 2012Eton Upstream Fry135284
12.3 cm19 Aug 2015Eton Upstream Fry146049
12.3 cm21 Aug 2007Eton Downstream Fry108613
12.2 cm20 Aug 2008Eton Downstream Fry125700
11.7 cm21 Aug 2007Eton Downstream Fry108613
11.5 cm31 Aug 2023Eton Upstream Fry164154
11.2 cm21 Aug 2012Eton Upstream Fry135284
11.2 cm21 Aug 2007Eton Upstream Fry108614
11.2 cm21 Aug 2007Eton Downstream Fry108613
10.9 cm21 Aug 2007Eton Downstream Fry108613

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
Eton Upstream Fry8 Sept 20044 Sept 202515
Eton Downstream Fry24 Aug 20034 Sept 202510

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 386 measured fish were spread across different length ranges.

Smallest
1.5 cm
Lower quarter
2.2 cm
Median
2.6 cm
Upper quarter
4.3 cm
Largest
14.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Eton College

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

Roach Minnow Gudgeon Dace Chub 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 →