Bleak · Alburnus alburnus

Bleak in the Old River Lea

Largest measured bleak: 19.8 cm

The largest bleak measured in Environment Agency surveys of the Old River Lea was 19.8 cm, recorded at Cornmill Meadows 3 (Mile Nursery) on 9 May 2008.

Across 1,618 measured bleak, the median measured length was 10 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Old River Lea.

See bleak records across England →

Most recent observation21 May 2026Cornmill Meadows 3 (Mile Nursery) · 6 fish

Largest measured bleak: 19.8 cm
Median length: 10 cm
Fish measured: 1,618
Survey locations: 1

Individual EA measurements

Largest measured bleak

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

Length	Survey date	Survey location	Survey ID
19.8 cm	9 May 2008	Cornmill Meadows 3 (Mile Nursery)	110971
19.6 cm	6 May 2009	Cornmill Meadows 3 (Mile Nursery)	117205
17.3 cm	1 May 2007	Cornmill Meadows 3 (Mile Nursery)	105396
17.1 cm	1 May 2007	Cornmill Meadows 3 (Mile Nursery)	105396
16.2 cm	6 May 2009	Cornmill Meadows 3 (Mile Nursery)	117205
15.5 cm	1 May 2007	Cornmill Meadows 3 (Mile Nursery)	105396
14.7 cm	1 May 2007	Cornmill Meadows 3 (Mile Nursery)	105396
14.6 cm	1 May 2007	Cornmill Meadows 3 (Mile Nursery)	105396
14.4 cm	10 May 2017	Cornmill Meadows 3 (Mile Nursery)	150395
14.3 cm	1 May 2007	Cornmill Meadows 3 (Mile Nursery)	105396

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 surveyed	First recorded	Last recorded	Visits finding bleak
Cornmill Meadows 3 (Mile Nursery)	1 May 2007	21 May 2026	12

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

2007–2026

Survey records by year

Each bar shows how many survey visits recorded bleak that year.

107

108

109

110

011

012

113

014

115

116

117

118

019

020

021

022

123

124

025

126

Fish measured by surveyors

Measured length distribution

See how the 1,618 measured fish were spread across different length ranges.

Smallest: 2.7 cm
Lower quarter: 8.4 cm
Median: 10 cm
Upper quarter: 11.2 cm
Largest: 19.8 cm

0–99 mm

776

100–199 mm

842

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Old River Lea

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

Perch Roach Chub Pike Tench 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 →