RiverFish

Bleak · Alburnus alburnus

Bleak in the River Stour

Largest measured bleak: 18.6 cm

The largest bleak measured in Environment Agency surveys of the River Stour was 18.6 cm, recorded at Lamarsh FGS A on 17 September 2022.

Across 3,298 measured bleak, the median measured length was 8.2 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 Stour.

See bleak records across England →

Most recent observation14 July 2026Tendring Hall · 14 fish
Largest measured bleak
18.6 cm
Median length
8.2 cm
Fish measured
3,298
Survey locations
27

Individual EA measurements

Largest measured bleak

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
18.6 cm17 Sept 2022Lamarsh FGS A162130
18.2 cm23 Aug 2018Pentlow Mill154325
16.3 cm11 Jul 2023Stratford162717
15.7 cm24 Jul 2025Anchor Bridge177972
15.7 cm20 Jul 2015Mill Meadow146709
15.3 cm28 Sept 2012Baythorne End134363
15.2 cm19 Jul 2017Bures Bridge A151701
15.1 cm25 Jul 2023Anchor Bridge162803
14.8 cm17 Jul 2018Bures Bridge A154097
14.7 cm31 Jul 2024Pentlow Mill167873

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 surveyedFirst recordedLast recordedVisits finding bleak
Tendring Hall19 Aug 202214 Jul 20263
Higham Hall2 Jul 20183 Jul 20268
Mill Meadow20 Jul 201511 Aug 202510
Bures Mill12 Jul 20175 Aug 20258
Lamarsh FGS A6 Aug 201530 Jul 20258
Pitmire A15 Jul 201529 Jul 202510
Anchor Bridge12 Nov 202124 Jul 20254
Fen Bridge11 Oct 202215 Jul 20254
Stratford22 Jun 201810 Jul 20255
Bower Hall8 Nov 20213 Sept 20242
Bush Boake Allen14 Aug 202414 Aug 20241
Boxted Mill25 Sept 202213 Aug 20242
Wormingford Mill30 Jul 20157 Aug 20243
Pentlow Mill23 Aug 201831 Jul 20242
Wiston Mill17 Jul 202417 Jul 20241
Bures Bridge A3 Aug 201610 Jul 20247
Downstream Dedham Mill3 Jul 20243 Jul 20241
Upstream Dedham Mill19 Jun 202419 Jun 20241
Clare Mill2 Oct 20182 Oct 20181
Baythorne End19 Sept 200620 Sept 20184
Shalford Weir23 Jul 20159 Aug 20162
Wixoe Pumping Station16 Sept 20091 Sept 20152
Wissington10 Jul 201310 Jul 20131
Liston Mill5 Sept 20125 Sept 20121
Kedington FGS21 Aug 200921 Aug 20091
Great Thurlow4 Oct 20064 Oct 20061
Bakers Mill A4 Aug 20034 Aug 20031

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

2003–2026

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 3,298 measured fish were spread across different length ranges.

Smallest
1.9 cm
Lower quarter
6.5 cm
Median
8.2 cm
Upper quarter
9.7 cm
Largest
18.6 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Stour

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

Roach European eel Perch Pike Chub Dace

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 →