Bleak · Alburnus alburnus

Bleak in the River Arun

Largest measured bleak: 14.2 cm

The largest bleak measured in Environment Agency surveys of the River Arun was 14.2 cm, recorded at Stopham Bridge on 21 October 2025.

Across 1,211 measured bleak, the median measured length was 6.3 cm.

Surveyors recorded weights for 710 bleak. The median was 0.1 oz (0.003 kg) and the largest recorded weight was 1 oz (0.028 kg).

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

See bleak records across England →

Most recent observation21 October 2025Stopham Bridge · 150 fish

Largest measured bleak: 14.2 cm
Median length: 6.3 cm
Fish measured: 1,211
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
14.2 cm	21 Oct 2025	Stopham Bridge	179497
13.9 cm	12 Sept 2002	Bignor Farm	61421
13.8 cm	21 Oct 2025	Stopham Bridge	179497
13.8 cm	21 Oct 2025	Stopham Bridge	179497
13.7 cm	21 Oct 2025	Stopham Bridge	179497
13.7 cm	21 Oct 2025	Stopham Bridge	179497
13.5 cm	21 Oct 2025	Stopham Bridge	179497
13.5 cm	12 Sept 2024	Bignor Farm	167161
13.3 cm	21 Oct 2025	Stopham Bridge	179497
13.3 cm	21 Oct 2025	Stopham Bridge	179497

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
Stopham Bridge	21 Oct 2025	21 Oct 2025	1
Crosby Farm	10 Sept 2025	10 Sept 2025	1
Pallingham	18 Sept 2003	8 Jul 2025	12
Bignor Farm	12 Sept 2002	12 Sept 2024	8
Pulborough Cut	28 Sept 2009	15 Sept 2010	2
Newbridge	30 Jul 2002	27 Jul 2007	5
Gibbons Mill	31 Jul 2002	26 Jul 2006	3

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

2002–2025

Survey records by year

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

302

203

304

405

406

307

108

209

210

011

012

013

114

015

116

017

018

119

020

021

122

023

124

325

Fish measured by surveyors

Measured length distribution

See how the 1,211 measured fish were spread across different length ranges.

Smallest: 1.8 cm
Lower quarter: 5 cm
Median: 6.3 cm
Upper quarter: 7.9 cm
Largest: 14.2 cm

0–99 mm

1111

100–199 mm

100

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 710 bleak. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0 oz (0.001 kg)
Lower quarter: 0 oz (0.001 kg)
Median: 0.1 oz (0.003 kg)
Upper quarter: 0.1 oz (0.004 kg)
Heaviest: 1 oz (0.028 kg)

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

More fish in this river

Explore the River Arun

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

Roach Chub Gudgeon European eel Minnow Pike

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 →