RiverFish

Bleak · Alburnus alburnus

Bleak in the River Ouzel

Largest measured bleak: 15.8 cm

The largest bleak measured in Environment Agency surveys of the River Ouzel was 15.8 cm, recorded at Newport Pagnell on 7 November 1990.

Across 859 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 River Ouzel.

See bleak records across England →

Most recent observation7 August 2025Newport Pagnell · 37 fish
Largest measured bleak
15.8 cm
Median length
9 cm
Fish measured
859
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.

LengthSurvey dateSurvey locationSurvey ID
15.8 cm7 Nov 1990Newport Pagnell29048
14.8 cm7 Nov 1990Newport Pagnell29048
14.5 cm20 Apr 2006Caldecote Mill90637
13.8 cm7 Nov 1990Newport Pagnell29048
13.6 cm11 Aug 2016DS Caldecote Mill148910
13.5 cm8 May 2002Caldecote Mill50762
13.4 cm7 Aug 2025Newport Pagnell177758
13.3 cm29 Jan 1998Castle Meadow29065
13.3 cm29 Jan 1998Castle Meadow29065
13.3 cm7 Nov 1990Newport Pagnell29048

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
Newport Pagnell7 Nov 19907 Aug 20257
DS Caldecote Mill17 Jun 201315 Jul 20193
Caldecote Mill8 May 200212 May 20108
Castle Meadow31 Mar 199530 Apr 200910

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

1990–2025

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 859 measured fish were spread across different length ranges.

Smallest
3.1 cm
Lower quarter
7.8 cm
Median
9 cm
Upper quarter
10 cm
Largest
15.8 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Ouzel

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

Gudgeon Perch Roach Dace Bullhead 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 →