Bleak · Alburnus alburnus

Bleak in the Cut-Off Channel

Largest measured bleak: 13.6 cm

The largest bleak measured in Environment Agency surveys of the Cut-Off Channel was 13.6 cm, recorded at Denver Sluice on 22 June 2023.

Across 102 measured bleak, the median measured length was 11.3 cm.

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

See bleak records across England →

Most recent observation22 June 2023Denver Sluice · 6 fish

Largest measured bleak: 13.6 cm
Median length: 11.3 cm
Fish measured: 102
Survey locations: 7

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
13.6 cm	22 Jun 2023	Denver Sluice	162443
13.6 cm	28 May 2012	Wissington	131373
13.3 cm	28 May 2012	Wissington	131373
13.3 cm	9 Oct 2000	Hilgay Bridge	30852
13.3 cm	9 Oct 2000	Hilgay Bridge	30852
13.2 cm	28 May 2012	Wissington	131373
13.1 cm	28 May 2012	Wissington	131373
13 cm	28 May 2012	Wissington	131373
12.8 cm	28 May 2012	Wissington	131373
12.8 cm	28 May 2012	Wissington	131373

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
Denver Sluice	4 Apr 2017	22 Jun 2023	2
Wretton	15 Jul 2003	11 Apr 2014	4
Stoke Ferry WTW	10 Apr 2014	10 Apr 2014	1
Wissington	12 Jul 1990	28 May 2012	4
Hilgay Bridge	9 Oct 2000	17 Jun 2005	3
Blackdyke Farm	19 Oct 1993	19 Oct 1993	1
Crossways Farm	13 Jul 1990	13 Jul 1990	1

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

1990–2023

Survey records by year

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

290

091

092

193

094

095

096

197

098

099

100

001

002

103

204

205

006

007

108

009

010

011

112

013

214

015

016

117

018

019

020

021

022

123

Fish measured by surveyors

Measured length distribution

See how the 102 measured fish were spread across different length ranges.

Smallest: 8.1 cm
Lower quarter: 9.5 cm
Median: 11.3 cm
Upper quarter: 11.8 cm
Largest: 13.6 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Cut-Off Channel

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

Roach Perch Pike Ruffe Common bream European eel

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 →