Bleak · Alburnus alburnus

Bleak in the Main river sites

Largest measured bleak: 15.3 cm

The largest bleak measured in Environment Agency surveys of the Main river sites was 15.3 cm, recorded at S5R Iford Bridge to Hengistbury Head on 3 May 2007.

Across 214 measured bleak, the median measured length was 9.9 cm.

Surveyors recorded one individual weight: 0.9 oz (0.025 kg).

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

See bleak records across England →

Most recent observation30 May 2018Canford School (top site S2S) · 1 fish

Largest measured bleak: 15.3 cm
Median length: 9.9 cm
Fish measured: 214
Survey locations: 9

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
15.3 cm	3 May 2007	S5R Iford Bridge to Hengistbury Head	105310
14.5 cm	26 May 2005	S4R Dudsbury to Merritown	84663
14 cm	26 May 2005	S4R Dudsbury to Merritown	84663
13.9 cm	22 May 2008	S4R Dudsbury to Merritown	111094
13.6 cm	7 Jun 2007	S4R Dudsbury to Merritown	105485
13.2 cm	26 May 2005	S4R Dudsbury to Merritown	84663
13.1 cm	16 May 2013	S4R Dudsbury to Merritown	136064
13.1 cm	26 May 2005	S4R Dudsbury to Merritown	84663
13 cm	22 May 2008	S4R Dudsbury to Merritown	111094
13 cm	26 May 2005	S4R Dudsbury to Merritown	84663

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
Canford School (top site S2S)	30 May 2018	30 May 2018	1
Canford Mill Stream	30 May 2018	30 May 2018	1
S5R Iford Bridge to Hengistbury Head	13 May 2004	21 May 2013	5
S4R Dudsbury to Merritown	17 Jun 2004	16 May 2013	5
Canford School Reach	31 May 2012	31 May 2012	1
S3R Corfe Mullen to Cowgrove	22 Jun 2004	4 Jun 2009	4
Muscliffe	13 Oct 2005	13 Oct 2005	1
Golf Course	13 Oct 2005	13 Oct 2005	1
S4 St Mary's Marnhull	24 Jul 2002	24 Jul 2002	1

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

2002–2018

Survey records by year

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

102

003

304

405

006

307

308

109

010

011

112

213

014

015

016

017

218

Fish measured by surveyors

Measured length distribution

See how the 214 measured fish were spread across different length ranges.

Smallest: 4 cm
Lower quarter: 8.8 cm
Median: 10 cm
Upper quarter: 11.1 cm
Largest: 15.3 cm

0–99 mm

107

100–199 mm

107

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

One individual weight was recorded for this fish and river. This is a subset of the measured fish and may not represent the whole population.

Recorded weight: 0.9 oz (0.025 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the Main river sites

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

Minnow Bullhead European eel Dace Stone loach Chub

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 →