Bleak · Alburnus alburnus

Bleak in the River Rother

Largest measured bleak: 14.5 cm

The largest bleak measured in Environment Agency surveys of the River Rother was 14.5 cm, recorded at Bodiam on 17 September 2025.

Across 1,087 measured bleak, the median measured length was 7.4 cm.

Surveyors recorded weights for 54 bleak. The median was 0.3 oz (0.008 kg) and the largest recorded weight was 0.4 oz (0.012 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 Rother.

See bleak records across England →

Most recent observation13 October 2025Blackwall Bridge · 29 fish

Largest measured bleak: 14.5 cm
Median length: 7.4 cm
Fish measured: 1,087
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
14.5 cm	17 Sept 2025	Bodiam	178693
12.9 cm	16 Jul 2019	Bodiam	154843
12.1 cm	10 Jun 2009	u/s Iden Bridge	119622
12 cm	18 Jun 2009	Bodiam	119427
12 cm	7 Jul 2006	Bodiam	103201
11.7 cm	3 Sept 2019	u/s Iden Bridge	155318
11.5 cm	17 Sept 2025	Bodiam	178693
11.5 cm	18 Jun 2009	Bodiam	119427
11.5 cm	20 Aug 2007	Bodiam	106486
11.5 cm	20 Aug 2007	Bodiam	106486

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
Blackwall Bridge	8 Oct 2004	13 Oct 2025	11
Bodiam	13 Sept 2002	17 Sept 2025	13
u/s Iden Bridge	4 Jul 2005	23 Jul 2025	10
Salehurst	31 Jul 2007	16 Jun 2008	2

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.

102

103

204

305

306

407

408

309

310

011

012

313

014

015

316

017

018

319

020

021

022

023

024

325

Fish measured by surveyors

Measured length distribution

See how the 1,087 measured fish were spread across different length ranges.

Smallest: 1.8 cm
Lower quarter: 4.9 cm
Median: 7.4 cm
Upper quarter: 9.3 cm
Largest: 14.5 cm

0–99 mm

943

100–199 mm

144

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

Recorded weights were available for 54 bleak. This is a subset of the measured fish and may not represent the whole population.

Lightest: 0.1 oz (0.002 kg)
Lower quarter: 0.2 oz (0.006 kg)
Median: 0.3 oz (0.008 kg)
Upper quarter: 0.3 oz (0.008 kg)
Heaviest: 0.4 oz (0.012 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 Rother

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

Roach Chub Perch Gudgeon European eel 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 →