RiverFish

Bleak · Alburnus alburnus

Bleak in the River Dearne

Largest measured bleak: 19.9 cm

The largest bleak measured in Environment Agency surveys of the River Dearne was 19.9 cm, recorded at meanders u/s Pastures Bridge on 30 June 2008.

Across 901 measured bleak, the median measured length was 2.9 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 Dearne.

See bleak records across England →

Most recent observation18 June 2026meanders u/s Pastures Bridge · 8 fish
Largest measured bleak
19.9 cm
Median length
2.9 cm
Fish measured
901
Survey locations
3

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
19.9 cm30 Jun 2008meanders u/s Pastures Bridge114212
18.2 cm22 Jun 2010meanders u/s Pastures Bridge124930
16.2 cm20 Jun 2014meanders u/s Pastures Bridge141563
15.7 cm20 Jun 2016meanders u/s Pastures Bridge148336
15.6 cm20 Jun 2012meanders u/s Pastures Bridge131597
15.4 cm26 Jun 2024meanders u/s Pastures Bridge165360
15.3 cm20 Jun 2016meanders u/s Pastures Bridge148336
15.2 cm20 Jun 2016meanders u/s Pastures Bridge148336
15 cm20 Jun 2016meanders u/s Pastures Bridge148336
15 cm21 Jun 2011meanders u/s Pastures Bridge128900

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
meanders u/s Pastures Bridge7 May 199818 Jun 202620
Pastures Bridge - Fry Survey1 Oct 199812 Aug 202514
Pastures Bridge7 May 19987 May 19981

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

1998–2026

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 901 measured fish were spread across different length ranges.

Smallest
1.3 cm
Lower quarter
2.5 cm
Median
2.9 cm
Upper quarter
7.1 cm
Largest
19.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Dearne

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

3-spined stickleback Gudgeon Brown / sea trout Chub 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 →