Bleak · Alburnus alburnus

Bleak in the River Aire

Largest measured bleak: 14.9 cm

The largest bleak measured in Environment Agency surveys of the River Aire was 14.9 cm, recorded at Castleford on 25 June 2009.

Across 66 measured bleak, the median measured length was 2.4 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 Aire.

See bleak records across England →

Most recent observation15 August 2024Chapel Haddelsey - Fry Survey · 7 fish

Largest measured bleak: 14.9 cm
Median length: 2.4 cm
Fish measured: 66
Survey locations: 4

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
14.9 cm	25 Jun 2009	Castleford	117734
14.1 cm	25 Jun 2009	Castleford	117734
14.1 cm	25 Jun 2009	Castleford	117734
13.7 cm	25 Jun 2009	Castleford	117734
13.3 cm	25 Jun 2009	Castleford	117734
13.3 cm	25 Jun 2009	Castleford	117734
12.4 cm	22 Jul 2002	Chappel Haddlesey - u/s A19	67466
12.2 cm	25 Jun 2009	Castleford	117734
12 cm	22 Jul 2002	Chappel Haddlesey - u/s A19	67466
11.3 cm	25 Jun 2009	Castleford	117734

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
Chapel Haddelsey - Fry Survey	24 Sept 2003	15 Aug 2024	4
Castleford	18 Jul 2005	25 Jun 2009	2
Chappel Haddlesey - u/s A19	22 Jul 2002	14 Sept 2004	2
Keighley (River Worth Confluence) - Fry Survey	25 Sept 2003	25 Sept 2003	1

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

2002–2024

Survey records by year

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

102

203

104

105

006

007

008

109

010

011

012

013

014

015

016

117

018

119

020

021

022

023

124

Fish measured by surveyors

Measured length distribution

See how the 66 measured fish were spread across different length ranges.

Smallest: 1.1 cm
Lower quarter: 2 cm
Median: 2.4 cm
Upper quarter: 3.2 cm
Largest: 14.9 cm

0–99 mm

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Aire

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

Minnow Stone loach Chub Gudgeon Bullhead Brown / sea trout

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 →