Bleak · Alburnus alburnus

Bleak in the River Stort

Largest measured bleak: 14.4 cm

The largest bleak measured in Environment Agency surveys of the River Stort was 14.4 cm, recorded at Briggens Park on 1 September 2010.

Across 330 measured bleak, the median measured length was 10.7 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 Stort.

See bleak records across England →

Most recent observation19 August 2025Grange Paddocks · 1 fish

Largest measured bleak: 14.4 cm
Median length: 10.7 cm
Fish measured: 330
Survey locations: 6

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
14.4 cm	1 Sept 2010	Briggens Park	123620
14.2 cm	27 Apr 2009	Roydon Loop	117200
14.1 cm	12 Aug 2013	Briggens Park	137825
13.8 cm	23 Aug 2017	Briggens Park	151656
13.8 cm	27 Apr 2009	Roydon Loop	117200
13.6 cm	27 Apr 2009	Roydon Loop	117200
13.4 cm	23 Aug 2017	Briggens Park	151656
13.2 cm	27 Apr 2009	Roydon Loop	117200
13.2 cm	27 Apr 2009	Roydon Loop	117200
13.1 cm	1 Sept 2010	Briggens Park	123620

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
Grange Paddocks	19 Aug 2025	19 Aug 2025	1
Briggens Park	15 Oct 2003	10 Sept 2019	11
Tednambury Mill (Little Hallingbury Mill)	11 Aug 2009	15 Aug 2014	2
Eastwick Loop	30 Apr 2009	30 Apr 2009	1
Sawbridgeworth Loop	29 Apr 2009	29 Apr 2009	1
Roydon Loop	27 Apr 2009	27 Apr 2009	1

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

2003–2025

Survey records by year

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

103

104

105

106

107

108

509

110

011

012

113

114

015

016

117

018

119

020

021

022

023

024

125

Fish measured by surveyors

Measured length distribution

See how the 330 measured fish were spread across different length ranges.

Smallest: 3.2 cm
Lower quarter: 9.4 cm
Median: 10.7 cm
Upper quarter: 11.7 cm
Largest: 14.4 cm

0–99 mm

115

100–199 mm

215

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Stort

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

Dace Chub Bullhead Pike Roach Minnow

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 →