RiverFish

Bleak · Alburnus alburnus

Bleak in the South Holland Main Drain

Largest measured bleak: 16.5 cm

The largest bleak measured in Environment Agency surveys of the South Holland Main Drain was 16.5 cm, recorded at Holland House on 1 July 1991.

Across 60 measured bleak, the median measured length was 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 South Holland Main Drain.

See bleak records across England →

Most recent observation4 June 1997Upstream Coy Sluice · 5 fish
Largest measured bleak
16.5 cm
Median length
9 cm
Fish measured
60
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.

LengthSurvey dateSurvey locationSurvey ID
16.5 cm1 Jul 1991Holland House54691
16 cm28 Jun 1991Upstream Wisemans Pumping Station54690
16 cm20 Jun 1991Downstream Coy Sluice54693
15.5 cm28 Jun 1991Upstream Wisemans Pumping Station54690
14.5 cm4 Jun 1997Upstream Coy Sluice54711
14.5 cm4 Jun 1997Upstream Coy Sluice54711
14.5 cm28 Jun 1991Upstream Wisemans Pumping Station54690
14.5 cm20 Jun 1991Downstream Coy Sluice54693
14 cm4 Jun 1997Upstream Coy Sluice54711
14 cm20 Jun 1991Downstream Coy Sluice54693

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
Upstream Coy Sluice8 Jul 19944 Jun 19972
Holland House1 Jul 19911 Jul 19911
Upstream Wisemans Pumping Station28 Jun 199128 Jun 19911
Leedsgate Bridge25 Jun 199125 Jun 19911
Downstream Coy Sluice20 Jun 199120 Jun 19911
Red House Bridge19 Jun 199119 Jun 19911
Shell Bridge15 Apr 198615 Apr 19861

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

1986–1997

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 60 measured fish were spread across different length ranges.

Smallest
5 cm
Lower quarter
8 cm
Median
9 cm
Upper quarter
13 cm
Largest
16.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the South Holland Main Drain

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

Roach Pike Gudgeon Common bream Perch Rudd

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 →