RiverFish

Bleak · Alburnus alburnus

Bleak in the River Lee

Largest measured bleak: 16.8 cm

The largest bleak measured in Environment Agency surveys of the River Lee was 16.8 cm, recorded at Hartham Common on 24 June 2010.

Across 1,003 measured bleak, the median measured length was 9.2 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 Lee.

See bleak records across England →

Most recent observation11 September 2025Hackney Marshes · 7 fish
Largest measured bleak
16.8 cm
Median length
9.2 cm
Fish measured
1,003
Survey locations
14

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
16.8 cm24 Jun 2010Hartham Common122497
14.6 cm29 May 2014Kings Weir Back Loop140926
14.6 cm22 Oct 1992Powder Mill Cut116060
14.4 cm29 May 2014Kings Weir Back Loop140926
14.3 cm28 Jul 2010Fishers Green123142
14.3 cm22 Aug 2003Hartham Common78509
14.2 cm29 May 2014Kings Weir Back Loop140926
14.2 cm28 Jul 2010Fishers Green123142
13.9 cm26 Sept 2006Hartham Common101536
13.8 cm28 Jan 1993Fishers Green116055

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
Hackney Marshes29 Sept 200411 Sept 20256
Fishers Green6 Sept 197829 Jul 202511
Stanborough Park16 Sept 200528 Jun 20192
Hartham Leisure centre24 Jun 201924 Jun 20191
Fishers Green barbel investigation3 Nov 20173 Nov 20171
Amwell Loop12 Apr 19785 Jul 20169
Hartham Common22 Aug 200325 Jun 201511
Kings Weir11 Jun 19922 Jun 20152
Kings Weir Back Loop14 May 201329 May 20142
Waterdale5 Aug 20105 Aug 20101
Tottenham Lock d/s8 Oct 20098 Oct 20091
Flour Mills Loop25 Sept 200311 Nov 20042
Powder Mill Cut22 Oct 199226 Aug 20042
River Lynch13 Oct 199213 Oct 19921

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

1978–2025

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 1,003 measured fish were spread across different length ranges.

Smallest
2.1 cm
Lower quarter
8 cm
Median
9.2 cm
Upper quarter
10.4 cm
Largest
16.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Lee

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

Roach Perch Gudgeon Minnow Chub Pike

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 →