Bleak · Alburnus alburnus

Bleak in the Wraysbury River

Largest measured bleak: 17.5 cm

The largest bleak measured in Environment Agency surveys of the Wraysbury River was 17.5 cm, recorded at Harmondsworth Moor on 3 June 2013.

Across 50 measured bleak, the median measured length was 9.8 cm.

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

See bleak records across England →

Most recent observation5 June 2018Harmondsworth Moor · 1 fish

Largest measured bleak: 17.5 cm
Median length: 9.8 cm
Fish measured: 50
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
17.5 cm	3 Jun 2013	Harmondsworth Moor	136267
15.6 cm	4 Aug 2004	Harmondsworth Moor	80906
13 cm	24 Jun 2008	Harmondsworth Moor	111536
12.7 cm	28 Jun 2007	Harmondsworth Moor	105720
12.1 cm	18 Jun 2015	Harmondsworth Moor	144973
11.9 cm	18 Jun 2015	Harmondsworth Moor	144973
11.8 cm	24 Jun 2008	Harmondsworth Moor	111536
11.6 cm	24 Jun 2008	Harmondsworth Moor	111536
11.5 cm	3 Jun 2013	Harmondsworth Moor	136267
11.2 cm	18 Jun 2015	Harmondsworth Moor	144973

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
Harmondsworth Moor	4 Aug 2004	5 Jun 2018	7

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

2004–2018

Survey records by year

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

104

005

006

107

108

109

010

011

012

113

014

115

016

017

118

Fish measured by surveyors

Measured length distribution

See how the 50 measured fish were spread across different length ranges.

Smallest: 7.6 cm
Lower quarter: 8.9 cm
Median: 9.8 cm
Upper quarter: 11.1 cm
Largest: 17.5 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Wraysbury River

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

Chub Dace Gudgeon Minnow Perch Bullhead

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 →